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Finding the Fourth Proportional to 485,901.47, 728,992.20 and 148,991.76

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Solution

The fourth proportional to 485,901.47, 728,992.20 and 148,991.76 is: 223,530.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,901.47 : 728,992.20 = 148,991.76 : x
  2. Step 2: Convert to fraction form
    485,901.47/728,992.20 = 148,991.76/x
  3. Step 3: Cross multiply
    485,901.47x = 728,992.20 × 148,991.76
  4. Step 4: Simplify right side
    485,901.47x = 108,613,830,904.27
  5. Step 5: Solve for x
    x = 108,613,830,904.27/485,901.47
  6. Step 6: Final answer
    x = 223,530.57

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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.