Home / 728,009.60-1,092,662.40-428,115.20

Finding the Fourth Proportional to 728,009.60, 1,092,662.40 and 428,115.20

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Solution

The fourth proportional to 728,009.60, 1,092,662.40 and 428,115.20 is: 642,553.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,009.60 : 1,092,662.40 = 428,115.20 : x
  2. Step 2: Convert to fraction form
    728,009.60/1,092,662.40 = 428,115.20/x
  3. Step 3: Cross multiply
    728,009.60x = 1,092,662.40 × 428,115.20
  4. Step 4: Simplify right side
    728,009.60x = 467,785,381,908.48
  5. Step 5: Solve for x
    x = 467,785,381,908.48/728,009.60
  6. Step 6: Final answer
    x = 642,553.86

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1.5x scale

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.