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Finding the Fourth Proportional to 656,368,658.64, 906,067,649.16 and 408,972,244.32

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Solution

The fourth proportional to 656,368,658.64, 906,067,649.16 and 408,972,244.32 is: 564,555,475.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,368,658.64 : 906,067,649.16 = 408,972,244.32 : x
  2. Step 2: Convert to fraction form
    656,368,658.64/906,067,649.16 = 408,972,244.32/x
  3. Step 3: Cross multiply
    656,368,658.64x = 906,067,649.16 × 408,972,244.32
  4. Step 4: Simplify right side
    656,368,658.64x = 370,556,519,982,711,552
  5. Step 5: Solve for x
    x = 370,556,519,982,711,552/656,368,658.64
  6. Step 6: Final answer
    x = 564,555,475.20

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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.