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Finding the Fourth Proportional to 287,787,612.80, 431,681,419.20 and 268,514,019.20

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Solution

The fourth proportional to 287,787,612.80, 431,681,419.20 and 268,514,019.20 is: 402,771,028.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,787,612.80 : 431,681,419.20 = 268,514,019.20 : x
  2. Step 2: Convert to fraction form
    287,787,612.80/431,681,419.20 = 268,514,019.20/x
  3. Step 3: Cross multiply
    287,787,612.80x = 431,681,419.20 × 268,514,019.20
  4. Step 4: Simplify right side
    287,787,612.80x = 115,912,512,883,352,048
  5. Step 5: Solve for x
    x = 115,912,512,883,352,048/287,787,612.80
  6. Step 6: Final answer
    x = 402,771,028.80

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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.