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Finding the Fourth Proportional to 485,405.10, 727,535.76 and 218,853.54

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Solution

The fourth proportional to 485,405.10, 727,535.76 and 218,853.54 is: 328,022.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,405.10 : 727,535.76 = 218,853.54 : x
  2. Step 2: Convert to fraction form
    485,405.10/727,535.76 = 218,853.54/x
  3. Step 3: Cross multiply
    485,405.10x = 727,535.76 × 218,853.54
  4. Step 4: Simplify right side
    485,405.10x = 159,223,776,552.59
  5. Step 5: Solve for x
    x = 159,223,776,552.59/485,405.10
  6. Step 6: Final answer
    x = 328,022.46

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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.