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Finding the Fourth Proportional to 572,713.68, 790,298.78 and 331,011.90

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Solution

The fourth proportional to 572,713.68, 790,298.78 and 331,011.90 is: 456,769.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,713.68 : 790,298.78 = 331,011.90 : x
  2. Step 2: Convert to fraction form
    572,713.68/790,298.78 = 331,011.90/x
  3. Step 3: Cross multiply
    572,713.68x = 790,298.78 × 331,011.90
  4. Step 4: Simplify right side
    572,713.68x = 261,598,300,735.48
  5. Step 5: Solve for x
    x = 261,598,300,735.48/572,713.68
  6. Step 6: Final answer
    x = 456,769.78

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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.