Home / 378,385.92-521,740.80-282,731.52

Finding the Fourth Proportional to 378,385.92, 521,740.80 and 282,731.52

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Solution

The fourth proportional to 378,385.92, 521,740.80 and 282,731.52 is: 389,846.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,385.92 : 521,740.80 = 282,731.52 : x
  2. Step 2: Convert to fraction form
    378,385.92/521,740.80 = 282,731.52/x
  3. Step 3: Cross multiply
    378,385.92x = 521,740.80 × 282,731.52
  4. Step 4: Simplify right side
    378,385.92x = 147,512,569,430.02
  5. Step 5: Solve for x
    x = 147,512,569,430.02/378,385.92
  6. Step 6: Final answer
    x = 389,846.88

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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.