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Finding the Fourth Proportional to 387,734.75, 535,064.60 and 215,652.20

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Solution

The fourth proportional to 387,734.75, 535,064.60 and 215,652.20 is: 297,594.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,734.75 : 535,064.60 = 215,652.20 : x
  2. Step 2: Convert to fraction form
    387,734.75/535,064.60 = 215,652.20/x
  3. Step 3: Cross multiply
    387,734.75x = 535,064.60 × 215,652.20
  4. Step 4: Simplify right side
    387,734.75x = 115,387,858,391.52
  5. Step 5: Solve for x
    x = 115,387,858,391.52/387,734.75
  6. Step 6: Final answer
    x = 297,594.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.