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Finding the Fourth Proportional to 486,997.44, 672,092.16 and 280,328.64

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Solution

The fourth proportional to 486,997.44, 672,092.16 and 280,328.64 is: 386,874.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,997.44 : 672,092.16 = 280,328.64 : x
  2. Step 2: Convert to fraction form
    486,997.44/672,092.16 = 280,328.64/x
  3. Step 3: Cross multiply
    486,997.44x = 672,092.16 × 280,328.64
  4. Step 4: Simplify right side
    486,997.44x = 188,406,681,167.46
  5. Step 5: Solve for x
    x = 188,406,681,167.46/486,997.44
  6. Step 6: Final answer
    x = 386,874.07

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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.