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Finding the Fourth Proportional to 485,712.96, 728,503.67 and 130,748.28

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Solution

The fourth proportional to 485,712.96, 728,503.67 and 130,748.28 is: 196,104.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,712.96 : 728,503.67 = 130,748.28 : x
  2. Step 2: Convert to fraction form
    485,712.96/728,503.67 = 130,748.28/x
  3. Step 3: Cross multiply
    485,712.96x = 728,503.67 × 130,748.28
  4. Step 4: Simplify right side
    485,712.96x = 95,250,599,421.17
  5. Step 5: Solve for x
    x = 95,250,599,421.17/485,712.96
  6. Step 6: Final answer
    x = 196,104.71

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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.