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Finding the Fourth Proportional to 534,287.40, 801,431.10 and 218,639.40

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Solution

The fourth proportional to 534,287.40, 801,431.10 and 218,639.40 is: 327,959.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    534,287.40 : 801,431.10 = 218,639.40 : x
  2. Step 2: Convert to fraction form
    534,287.40/801,431.10 = 218,639.40/x
  3. Step 3: Cross multiply
    534,287.40x = 801,431.10 × 218,639.40
  4. Step 4: Simplify right side
    534,287.40x = 175,224,414,845.34
  5. Step 5: Solve for x
    x = 175,224,414,845.34/534,287.40
  6. Step 6: Final answer
    x = 327,959.10

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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.