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Finding the Fourth Proportional to 861,905,375.52, 1,293,039,637.65 and 279,594,152.88

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Solution

The fourth proportional to 861,905,375.52, 1,293,039,637.65 and 279,594,152.88 is: 419,450,130.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,905,375.52 : 1,293,039,637.65 = 279,594,152.88 : x
  2. Step 2: Convert to fraction form
    861,905,375.52/1,293,039,637.65 = 279,594,152.88/x
  3. Step 3: Cross multiply
    861,905,375.52x = 1,293,039,637.65 × 279,594,152.88
  4. Step 4: Simplify right side
    861,905,375.52x = 361,526,322,129,013,952
  5. Step 5: Solve for x
    x = 361,526,322,129,013,952/861,905,375.52
  6. Step 6: Final answer
    x = 419,450,130.37

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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.