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Finding the Fourth Proportional to 387,243.88, 534,481.87 and 215,220.90

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Solution

The fourth proportional to 387,243.88, 534,481.87 and 215,220.90 is: 297,052.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,243.88 : 534,481.87 = 215,220.90 : x
  2. Step 2: Convert to fraction form
    387,243.88/534,481.87 = 215,220.90/x
  3. Step 3: Cross multiply
    387,243.88x = 534,481.87 × 215,220.90
  4. Step 4: Simplify right side
    387,243.88x = 115,031,669,095.08
  5. Step 5: Solve for x
    x = 115,031,669,095.08/387,243.88
  6. Step 6: Final answer
    x = 297,052.26

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1.5x scale

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.