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Finding the Fourth Proportional to 486,122.40, 728,017.20 and 236,512.80

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Solution

The fourth proportional to 486,122.40, 728,017.20 and 236,512.80 is: 354,201.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,122.40 : 728,017.20 = 236,512.80 : x
  2. Step 2: Convert to fraction form
    486,122.40/728,017.20 = 236,512.80/x
  3. Step 3: Cross multiply
    486,122.40x = 728,017.20 × 236,512.80
  4. Step 4: Simplify right side
    486,122.40x = 172,185,386,420.16
  5. Step 5: Solve for x
    x = 172,185,386,420.16/486,122.40
  6. Step 6: Final answer
    x = 354,201.71

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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.