Home / 814,211.40-1,221,317.10-394,307.40

Finding the Fourth Proportional to 814,211.40, 1,221,317.10 and 394,307.40

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Solution

The fourth proportional to 814,211.40, 1,221,317.10 and 394,307.40 is: 591,461.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,211.40 : 1,221,317.10 = 394,307.40 : x
  2. Step 2: Convert to fraction form
    814,211.40/1,221,317.10 = 394,307.40/x
  3. Step 3: Cross multiply
    814,211.40x = 1,221,317.10 × 394,307.40
  4. Step 4: Simplify right side
    814,211.40x = 481,574,370,276.54
  5. Step 5: Solve for x
    x = 481,574,370,276.54/814,211.40
  6. Step 6: Final answer
    x = 591,461.10

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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.