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Finding the Fourth Proportional to 485,356.25, 728,034.38 and 148,396.91

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Solution

The fourth proportional to 485,356.25, 728,034.38 and 148,396.91 is: 222,595.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,356.25 : 728,034.38 = 148,396.91 : x
  2. Step 2: Convert to fraction form
    485,356.25/728,034.38 = 148,396.91/x
  3. Step 3: Cross multiply
    485,356.25x = 728,034.38 × 148,396.91
  4. Step 4: Simplify right side
    485,356.25x = 108,038,052,635.29
  5. Step 5: Solve for x
    x = 108,038,052,635.29/485,356.25
  6. Step 6: Final answer
    x = 222,595.37

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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.