Home / 390,108.41-585,331.65-137,569.35

Finding the Fourth Proportional to 390,108.41, 585,331.65 and 137,569.35

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Solution

The fourth proportional to 390,108.41, 585,331.65 and 137,569.35 is: 206,413.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,108.41 : 585,331.65 = 137,569.35 : x
  2. Step 2: Convert to fraction form
    390,108.41/585,331.65 = 137,569.35/x
  3. Step 3: Cross multiply
    390,108.41x = 585,331.65 × 137,569.35
  4. Step 4: Simplify right side
    390,108.41x = 80,523,694,624.93
  5. Step 5: Solve for x
    x = 80,523,694,624.93/390,108.41
  6. Step 6: Final answer
    x = 206,413.63

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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.