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Finding the Fourth Proportional to 888,684,686.64, 1,227,209,231.40 and 665,278,514.15

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Solution

The fourth proportional to 888,684,686.64, 1,227,209,231.40 and 665,278,514.15 is: 918,701,476.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    888,684,686.64 : 1,227,209,231.40 = 665,278,514.15 : x
  2. Step 2: Convert to fraction form
    888,684,686.64/1,227,209,231.40 = 665,278,514.15/x
  3. Step 3: Cross multiply
    888,684,686.64x = 1,227,209,231.40 × 665,278,514.15
  4. Step 4: Simplify right side
    888,684,686.64x = 816,435,934,010,819,456
  5. Step 5: Solve for x
    x = 816,435,934,010,819,456/888,684,686.64
  6. Step 6: Final answer
    x = 918,701,476.78

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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.