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Finding the Fourth Proportional to 363,487,808.60, 545,231,712.90 and 218,368,986.20

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Solution

The fourth proportional to 363,487,808.60, 545,231,712.90 and 218,368,986.20 is: 327,553,479.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,487,808.60 : 545,231,712.90 = 218,368,986.20 : x
  2. Step 2: Convert to fraction form
    363,487,808.60/545,231,712.90 = 218,368,986.20/x
  3. Step 3: Cross multiply
    363,487,808.60x = 545,231,712.90 × 218,368,986.20
  4. Step 4: Simplify right side
    363,487,808.60x = 119,061,696,390,062,448
  5. Step 5: Solve for x
    x = 119,061,696,390,062,448/363,487,808.60
  6. Step 6: Final answer
    x = 327,553,479.30

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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.