Home / 390,186.15-585,326.10-137,414.41

Finding the Fourth Proportional to 390,186.15, 585,326.10 and 137,414.41

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Solution

The fourth proportional to 390,186.15, 585,326.10 and 137,414.41 is: 206,138.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,186.15 : 585,326.10 = 137,414.41 : x
  2. Step 2: Convert to fraction form
    390,186.15/585,326.10 = 137,414.41/x
  3. Step 3: Cross multiply
    390,186.15x = 585,326.10 × 137,414.41
  4. Step 4: Simplify right side
    390,186.15x = 80,432,240,689.10
  5. Step 5: Solve for x
    x = 80,432,240,689.10/390,186.15
  6. Step 6: Final answer
    x = 206,138.13

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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.