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Finding the Fourth Proportional to 521,068.40, 781,602.60 and 221,449.40

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Solution

The fourth proportional to 521,068.40, 781,602.60 and 221,449.40 is: 332,174.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,068.40 : 781,602.60 = 221,449.40 : x
  2. Step 2: Convert to fraction form
    521,068.40/781,602.60 = 221,449.40/x
  3. Step 3: Cross multiply
    521,068.40x = 781,602.60 × 221,449.40
  4. Step 4: Simplify right side
    521,068.40x = 173,085,426,808.44
  5. Step 5: Solve for x
    x = 173,085,426,808.44/521,068.40
  6. Step 6: Final answer
    x = 332,174.10

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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.