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Finding the Fourth Proportional to 486,541.80, 729,810.90 and 131,555.78

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Solution

The fourth proportional to 486,541.80, 729,810.90 and 131,555.78 is: 197,333.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,541.80 : 729,810.90 = 131,555.78 : x
  2. Step 2: Convert to fraction form
    486,541.80/729,810.90 = 131,555.78/x
  3. Step 3: Cross multiply
    486,541.80x = 729,810.90 × 131,555.78
  4. Step 4: Simplify right side
    486,541.80x = 96,010,842,202.00
  5. Step 5: Solve for x
    x = 96,010,842,202.00/486,541.80
  6. Step 6: Final answer
    x = 197,333.18

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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.