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Finding the Fourth Proportional to 673,306.76, 929,182.76 and 371,520.20

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Solution

The fourth proportional to 673,306.76, 929,182.76 and 371,520.20 is: 512,708.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,306.76 : 929,182.76 = 371,520.20 : x
  2. Step 2: Convert to fraction form
    673,306.76/929,182.76 = 371,520.20/x
  3. Step 3: Cross multiply
    673,306.76x = 929,182.76 × 371,520.20
  4. Step 4: Simplify right side
    673,306.76x = 345,210,164,831.75
  5. Step 5: Solve for x
    x = 345,210,164,831.75/673,306.76
  6. Step 6: Final answer
    x = 512,708.60

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Half scale
Find fourth proportional to 1,346,613.52, 1,858,365.52 and 743,040.40
Double scale
Find fourth proportional to 673,307.76, 929,184.14 and 371,521.20
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.