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Finding the Fourth Proportional to 381,673.80, 572,510.70 and 361,990.80

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Solution

The fourth proportional to 381,673.80, 572,510.70 and 361,990.80 is: 542,986.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,673.80 : 572,510.70 = 361,990.80 : x
  2. Step 2: Convert to fraction form
    381,673.80/572,510.70 = 361,990.80/x
  3. Step 3: Cross multiply
    381,673.80x = 572,510.70 × 361,990.80
  4. Step 4: Simplify right side
    381,673.80x = 207,243,606,301.56
  5. Step 5: Solve for x
    x = 207,243,606,301.56/381,673.80
  6. Step 6: Final answer
    x = 542,986.20

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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.