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Finding the Fourth Proportional to 485,720.70, 728,046.45 and 170,015.10

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Solution

The fourth proportional to 485,720.70, 728,046.45 and 170,015.10 is: 254,835.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,720.70 : 728,046.45 = 170,015.10 : x
  2. Step 2: Convert to fraction form
    485,720.70/728,046.45 = 170,015.10/x
  3. Step 3: Cross multiply
    485,720.70x = 728,046.45 × 170,015.10
  4. Step 4: Simplify right side
    485,720.70x = 123,778,890,001.40
  5. Step 5: Solve for x
    x = 123,778,890,001.40/485,720.70
  6. Step 6: Final answer
    x = 254,835.53

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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.