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Finding the Fourth Proportional to 487,589.50, 672,930.34 and 283,649.02

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Solution

The fourth proportional to 487,589.50, 672,930.34 and 283,649.02 is: 391,468.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,589.50 : 672,930.34 = 283,649.02 : x
  2. Step 2: Convert to fraction form
    487,589.50/672,930.34 = 283,649.02/x
  3. Step 3: Cross multiply
    487,589.50x = 672,930.34 × 283,649.02
  4. Step 4: Simplify right side
    487,589.50x = 190,876,030,673.34
  5. Step 5: Solve for x
    x = 190,876,030,673.34/487,589.50
  6. Step 6: Final answer
    x = 391,468.71

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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.