Home / 390,501.06-585,839.52-137,799.60

Finding the Fourth Proportional to 390,501.06, 585,839.52 and 137,799.60

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Solution

The fourth proportional to 390,501.06, 585,839.52 and 137,799.60 is: 206,730.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,501.06 : 585,839.52 = 137,799.60 : x
  2. Step 2: Convert to fraction form
    390,501.06/585,839.52 = 137,799.60/x
  3. Step 3: Cross multiply
    390,501.06x = 585,839.52 × 137,799.60
  4. Step 4: Simplify right side
    390,501.06x = 80,728,451,520.19
  5. Step 5: Solve for x
    x = 80,728,451,520.19/390,501.06
  6. Step 6: Final answer
    x = 206,730.43

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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.