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Finding the Fourth Proportional to 646,852.80, 970,279.20 and 553,540.80

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Solution

The fourth proportional to 646,852.80, 970,279.20 and 553,540.80 is: 830,311.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,852.80 : 970,279.20 = 553,540.80 : x
  2. Step 2: Convert to fraction form
    646,852.80/970,279.20 = 553,540.80/x
  3. Step 3: Cross multiply
    646,852.80x = 970,279.20 × 553,540.80
  4. Step 4: Simplify right side
    646,852.80x = 537,089,124,591.36
  5. Step 5: Solve for x
    x = 537,089,124,591.36/646,852.80
  6. Step 6: Final answer
    x = 830,311.20

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.