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Finding the Fourth Proportional to 485,671,524, 728,344,150.82 and 158,069,990.90

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Solution

The fourth proportional to 485,671,524, 728,344,150.82 and 158,069,990.90 is: 237,051,891.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,671,524 : 728,344,150.82 = 158,069,990.90 : x
  2. Step 2: Convert to fraction form
    485,671,524/728,344,150.82 = 158,069,990.90/x
  3. Step 3: Cross multiply
    485,671,524x = 728,344,150.82 × 158,069,990.90
  4. Step 4: Simplify right side
    485,671,524x = 115,129,353,292,185,648
  5. Step 5: Solve for x
    x = 115,129,353,292,185,648/485,671,524
  6. Step 6: Final answer
    x = 237,051,891.25

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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.