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Finding the Fourth Proportional to 390,498.06, 585,835.03 and 137,796.59

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Solution

The fourth proportional to 390,498.06, 585,835.03 and 137,796.59 is: 206,725.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,498.06 : 585,835.03 = 137,796.59 : x
  2. Step 2: Convert to fraction form
    390,498.06/585,835.03 = 137,796.59/x
  3. Step 3: Cross multiply
    390,498.06x = 585,835.03 × 137,796.59
  4. Step 4: Simplify right side
    390,498.06x = 80,726,071,073.38
  5. Step 5: Solve for x
    x = 80,726,071,073.38/390,498.06
  6. Step 6: Final answer
    x = 206,725.92

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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.