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Finding the Fourth Proportional to 572,668.20, 790,318.68 and 318,019.38

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Solution

The fourth proportional to 572,668.20, 790,318.68 and 318,019.38 is: 438,887.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,668.20 : 790,318.68 = 318,019.38 : x
  2. Step 2: Convert to fraction form
    572,668.20/790,318.68 = 318,019.38/x
  3. Step 3: Cross multiply
    572,668.20x = 790,318.68 × 318,019.38
  4. Step 4: Simplify right side
    572,668.20x = 251,336,656,616.02
  5. Step 5: Solve for x
    x = 251,336,656,616.02/572,668.20
  6. Step 6: Final answer
    x = 438,887.05

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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.