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Finding the Fourth Proportional to 521,429.40, 782,144.10 and 334,805.40

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Solution

The fourth proportional to 521,429.40, 782,144.10 and 334,805.40 is: 502,208.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,429.40 : 782,144.10 = 334,805.40 : x
  2. Step 2: Convert to fraction form
    521,429.40/782,144.10 = 334,805.40/x
  3. Step 3: Cross multiply
    521,429.40x = 782,144.10 × 334,805.40
  4. Step 4: Simplify right side
    521,429.40x = 261,866,068,258.14
  5. Step 5: Solve for x
    x = 261,866,068,258.14/521,429.40
  6. Step 6: Final answer
    x = 502,208.10

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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.