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Finding the Fourth Proportional to 485,925.17, 728,804.71 and 130,856.15

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Solution

The fourth proportional to 485,925.17, 728,804.71 and 130,856.15 is: 196,261.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,925.17 : 728,804.71 = 130,856.15 : x
  2. Step 2: Convert to fraction form
    485,925.17/728,804.71 = 130,856.15/x
  3. Step 3: Cross multiply
    485,925.17x = 728,804.71 × 130,856.15
  4. Step 4: Simplify right side
    485,925.17x = 95,368,578,452.47
  5. Step 5: Solve for x
    x = 95,368,578,452.47/485,925.17
  6. Step 6: Final answer
    x = 196,261.86

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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.