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Finding the Fourth Proportional to 489,691.80, 734,537.70 and 486,581.40

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Solution

The fourth proportional to 489,691.80, 734,537.70 and 486,581.40 is: 729,872.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,691.80 : 734,537.70 = 486,581.40 : x
  2. Step 2: Convert to fraction form
    489,691.80/734,537.70 = 486,581.40/x
  3. Step 3: Cross multiply
    489,691.80x = 734,537.70 × 486,581.40
  4. Step 4: Simplify right side
    489,691.80x = 357,412,382,418.78
  5. Step 5: Solve for x
    x = 357,412,382,418.78/489,691.80
  6. Step 6: Final answer
    x = 729,872.10

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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.