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Finding the Fourth Proportional to 663,339,254.40, 915,411,353.76 and 365,981,479.68

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Solution

The fourth proportional to 663,339,254.40, 915,411,353.76 and 365,981,479.68 is: 505,056,197.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,339,254.40 : 915,411,353.76 = 365,981,479.68 : x
  2. Step 2: Convert to fraction form
    663,339,254.40/915,411,353.76 = 365,981,479.68/x
  3. Step 3: Cross multiply
    663,339,254.40x = 915,411,353.76 × 365,981,479.68
  4. Step 4: Simplify right side
    663,339,254.40x = 335,023,601,764,956,736
  5. Step 5: Solve for x
    x = 335,023,601,764,956,736/663,339,254.40
  6. Step 6: Final answer
    x = 505,056,197.93

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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.