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Finding the Fourth Proportional to 572,728.46, 790,367.12 and 318,079.64

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Solution

The fourth proportional to 572,728.46, 790,367.12 and 318,079.64 is: 438,950.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,728.46 : 790,367.12 = 318,079.64 : x
  2. Step 2: Convert to fraction form
    572,728.46/790,367.12 = 318,079.64/x
  3. Step 3: Cross multiply
    572,728.46x = 790,367.12 × 318,079.64
  4. Step 4: Simplify right side
    572,728.46x = 251,399,687,407.04
  5. Step 5: Solve for x
    x = 251,399,687,407.04/572,728.46
  6. Step 6: Final answer
    x = 438,950.93

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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.