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Finding the Fourth Proportional to 572,524.79, 790,108.89 and 317,876

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Solution

The fourth proportional to 572,524.79, 790,108.89 and 317,876 is: 438,682.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,524.79 : 790,108.89 = 317,876 : x
  2. Step 2: Convert to fraction form
    572,524.79/790,108.89 = 317,876/x
  3. Step 3: Cross multiply
    572,524.79x = 790,108.89 × 317,876
  4. Step 4: Simplify right side
    572,524.79x = 251,156,653,517.64
  5. Step 5: Solve for x
    x = 251,156,653,517.64/572,524.79
  6. Step 6: Final answer
    x = 438,682.58

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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.