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Finding the Fourth Proportional to 485,324.80, 727,641.60 and 185,689.60

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Solution

The fourth proportional to 485,324.80, 727,641.60 and 185,689.60 is: 278,402.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,324.80 : 727,641.60 = 185,689.60 : x
  2. Step 2: Convert to fraction form
    485,324.80/727,641.60 = 185,689.60/x
  3. Step 3: Cross multiply
    485,324.80x = 727,641.60 × 185,689.60
  4. Step 4: Simplify right side
    485,324.80x = 135,115,477,647.36
  5. Step 5: Solve for x
    x = 135,115,477,647.36/485,324.80
  6. Step 6: Final answer
    x = 278,402.17

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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.