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Finding the Fourth Proportional to 485,056.80, 727,585.20 and 248,320.80

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Solution

The fourth proportional to 485,056.80, 727,585.20 and 248,320.80 is: 372,481.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,056.80 : 727,585.20 = 248,320.80 : x
  2. Step 2: Convert to fraction form
    485,056.80/727,585.20 = 248,320.80/x
  3. Step 3: Cross multiply
    485,056.80x = 727,585.20 × 248,320.80
  4. Step 4: Simplify right side
    485,056.80x = 180,674,538,932.16
  5. Step 5: Solve for x
    x = 180,674,538,932.16/485,056.80
  6. Step 6: Final answer
    x = 372,481.20

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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.