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Finding the Fourth Proportional to 387,042.30, 534,024.90 and 225,805.32

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Solution

The fourth proportional to 387,042.30, 534,024.90 and 225,805.32 is: 311,556.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,042.30 : 534,024.90 = 225,805.32 : x
  2. Step 2: Convert to fraction form
    387,042.30/534,024.90 = 225,805.32/x
  3. Step 3: Cross multiply
    387,042.30x = 534,024.90 × 225,805.32
  4. Step 4: Simplify right side
    387,042.30x = 120,585,663,432.47
  5. Step 5: Solve for x
    x = 120,585,663,432.47/387,042.30
  6. Step 6: Final answer
    x = 311,556.81

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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.