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Finding the Fourth Proportional to 572,843.28, 790,557.78 and 318,192.66

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Solution

The fourth proportional to 572,843.28, 790,557.78 and 318,192.66 is: 439,124.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,843.28 : 790,557.78 = 318,192.66 : x
  2. Step 2: Convert to fraction form
    572,843.28/790,557.78 = 318,192.66/x
  3. Step 3: Cross multiply
    572,843.28x = 790,557.78 × 318,192.66
  4. Step 4: Simplify right side
    572,843.28x = 251,549,682,901.90
  5. Step 5: Solve for x
    x = 251,549,682,901.90/572,843.28
  6. Step 6: Final answer
    x = 439,124.79

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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.