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Finding the Fourth Proportional to 485,411.92, 728,445.90 and 169,871.56

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Solution

The fourth proportional to 485,411.92, 728,445.90 and 169,871.56 is: 254,922.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,411.92 : 728,445.90 = 169,871.56 : x
  2. Step 2: Convert to fraction form
    485,411.92/728,445.90 = 169,871.56/x
  3. Step 3: Cross multiply
    485,411.92x = 728,445.90 × 169,871.56
  4. Step 4: Simplify right side
    485,411.92x = 123,742,241,408.60
  5. Step 5: Solve for x
    x = 123,742,241,408.60/485,411.92
  6. Step 6: Final answer
    x = 254,922.13

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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.