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Finding the Fourth Proportional to 485,734.40, 728,601.60 and 153,267.20

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Solution

The fourth proportional to 485,734.40, 728,601.60 and 153,267.20 is: 229,900.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,734.40 : 728,601.60 = 153,267.20 : x
  2. Step 2: Convert to fraction form
    485,734.40/728,601.60 = 153,267.20/x
  3. Step 3: Cross multiply
    485,734.40x = 728,601.60 × 153,267.20
  4. Step 4: Simplify right side
    485,734.40x = 111,670,727,147.52
  5. Step 5: Solve for x
    x = 111,670,727,147.52/485,734.40
  6. Step 6: Final answer
    x = 229,900.80

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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.