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Finding the Fourth Proportional to 485,339.32, 728,010.84 and 148,378.66

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Solution

The fourth proportional to 485,339.32, 728,010.84 and 148,378.66 is: 222,568.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,339.32 : 728,010.84 = 148,378.66 : x
  2. Step 2: Convert to fraction form
    485,339.32/728,010.84 = 148,378.66/x
  3. Step 3: Cross multiply
    485,339.32x = 728,010.84 × 148,378.66
  4. Step 4: Simplify right side
    485,339.32x = 108,021,272,904.67
  5. Step 5: Solve for x
    x = 108,021,272,904.67/485,339.32
  6. Step 6: Final answer
    x = 222,568.56

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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.