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Finding the Fourth Proportional to 386,689.50, 580,034.25 and 137,381.34

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Solution

The fourth proportional to 386,689.50, 580,034.25 and 137,381.34 is: 206,072.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,689.50 : 580,034.25 = 137,381.34 : x
  2. Step 2: Convert to fraction form
    386,689.50/580,034.25 = 137,381.34/x
  3. Step 3: Cross multiply
    386,689.50x = 580,034.25 × 137,381.34
  4. Step 4: Simplify right side
    386,689.50x = 79,685,882,510.90
  5. Step 5: Solve for x
    x = 79,685,882,510.90/386,689.50
  6. Step 6: Final answer
    x = 206,072.01

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1.5x scale

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.