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Finding the Fourth Proportional to 572,722.67, 790,359.15 and 318,073.86

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Solution

The fourth proportional to 572,722.67, 790,359.15 and 318,073.86 is: 438,942.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,722.67 : 790,359.15 = 318,073.86 : x
  2. Step 2: Convert to fraction form
    572,722.67/790,359.15 = 318,073.86/x
  3. Step 3: Cross multiply
    572,722.67x = 790,359.15 × 318,073.86
  4. Step 4: Simplify right side
    572,722.67x = 251,392,585,626.82
  5. Step 5: Solve for x
    x = 251,392,585,626.82/572,722.67
  6. Step 6: Final answer
    x = 438,942.96

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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.