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Finding the Fourth Proportional to 391,816.36, 587,724.42 and 181,339.48

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Solution

The fourth proportional to 391,816.36, 587,724.42 and 181,339.48 is: 272,009.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,816.36 : 587,724.42 = 181,339.48 : x
  2. Step 2: Convert to fraction form
    391,816.36/587,724.42 = 181,339.48/x
  3. Step 3: Cross multiply
    391,816.36x = 587,724.42 × 181,339.48
  4. Step 4: Simplify right side
    391,816.36x = 106,577,640,706.10
  5. Step 5: Solve for x
    x = 106,577,640,706.10/391,816.36
  6. Step 6: Final answer
    x = 272,009.16

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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.