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Finding the Fourth Proportional to 485,628.09, 728,652.42 and 260,726.11

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Solution

The fourth proportional to 485,628.09, 728,652.42 and 260,726.11 is: 391,202.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,628.09 : 728,652.42 = 260,726.11 : x
  2. Step 2: Convert to fraction form
    485,628.09/728,652.42 = 260,726.11/x
  3. Step 3: Cross multiply
    485,628.09x = 728,652.42 × 260,726.11
  4. Step 4: Simplify right side
    485,628.09x = 189,978,711,008.69
  5. Step 5: Solve for x
    x = 189,978,711,008.69/485,628.09
  6. Step 6: Final answer
    x = 391,202.06

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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.