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Finding the Fourth Proportional to 423,804,714.60, 636,112,979.10 and 219,479,428.20

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Solution

The fourth proportional to 423,804,714.60, 636,112,979.10 and 219,479,428.20 is: 329,429,352.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,804,714.60 : 636,112,979.10 = 219,479,428.20 : x
  2. Step 2: Convert to fraction form
    423,804,714.60/636,112,979.10 = 219,479,428.20/x
  3. Step 3: Cross multiply
    423,804,714.60x = 636,112,979.10 × 219,479,428.20
  4. Step 4: Simplify right side
    423,804,714.60x = 139,613,712,923,466,544
  5. Step 5: Solve for x
    x = 139,613,712,923,466,544/423,804,714.60
  6. Step 6: Final answer
    x = 329,429,352.99

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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.