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Finding the Fourth Proportional to 572,997.72, 790,761.46 and 318,348.91

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Solution

The fourth proportional to 572,997.72, 790,761.46 and 318,348.91 is: 439,335.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,997.72 : 790,761.46 = 318,348.91 : x
  2. Step 2: Convert to fraction form
    572,997.72/790,761.46 = 318,348.91/x
  3. Step 3: Cross multiply
    572,997.72x = 790,761.46 × 318,348.91
  4. Step 4: Simplify right side
    572,997.72x = 251,738,048,861.01
  5. Step 5: Solve for x
    x = 251,738,048,861.01/572,997.72
  6. Step 6: Final answer
    x = 439,335.17

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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.