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Finding the Fourth Proportional to 486,538.79, 729,806.40 and 131,552.78

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Solution

The fourth proportional to 486,538.79, 729,806.40 and 131,552.78 is: 197,328.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,538.79 : 729,806.40 = 131,552.78 : x
  2. Step 2: Convert to fraction form
    486,538.79/729,806.40 = 131,552.78/x
  3. Step 3: Cross multiply
    486,538.79x = 729,806.40 × 131,552.78
  4. Step 4: Simplify right side
    486,538.79x = 96,008,057,132.76
  5. Step 5: Solve for x
    x = 96,008,057,132.76/486,538.79
  6. Step 6: Final answer
    x = 197,328.68

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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.