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Finding the Fourth Proportional to 399,695.76, 551,563.68 and 218,414.04

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Solution

The fourth proportional to 399,695.76, 551,563.68 and 218,414.04 is: 301,402.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,695.76 : 551,563.68 = 218,414.04 : x
  2. Step 2: Convert to fraction form
    399,695.76/551,563.68 = 218,414.04/x
  3. Step 3: Cross multiply
    399,695.76x = 551,563.68 × 218,414.04
  4. Step 4: Simplify right side
    399,695.76x = 120,469,251,666.07
  5. Step 5: Solve for x
    x = 120,469,251,666.07/399,695.76
  6. Step 6: Final answer
    x = 301,402.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.