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Finding the Fourth Proportional to 885,805.80, 1,328,708.70 and 324,767.40

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Solution

The fourth proportional to 885,805.80, 1,328,708.70 and 324,767.40 is: 487,151.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,805.80 : 1,328,708.70 = 324,767.40 : x
  2. Step 2: Convert to fraction form
    885,805.80/1,328,708.70 = 324,767.40/x
  3. Step 3: Cross multiply
    885,805.80x = 1,328,708.70 × 324,767.40
  4. Step 4: Simplify right side
    885,805.80x = 431,521,269,856.38
  5. Step 5: Solve for x
    x = 431,521,269,856.38/885,805.80
  6. Step 6: Final answer
    x = 487,151.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.