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Finding the Fourth Proportional to 485,173.60, 727,792.80 and 165,320.80

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Solution

The fourth proportional to 485,173.60, 727,792.80 and 165,320.80 is: 247,992.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,173.60 : 727,792.80 = 165,320.80 : x
  2. Step 2: Convert to fraction form
    485,173.60/727,792.80 = 165,320.80/x
  3. Step 3: Cross multiply
    485,173.60x = 727,792.80 × 165,320.80
  4. Step 4: Simplify right side
    485,173.60x = 120,319,287,930.24
  5. Step 5: Solve for x
    x = 120,319,287,930.24/485,173.60
  6. Step 6: Final answer
    x = 247,992.24

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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.