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Finding the Fourth Proportional to 391,426.02, 587,226.51 and 125,202.51

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Solution

The fourth proportional to 391,426.02, 587,226.51 and 125,202.51 is: 187,831.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,426.02 : 587,226.51 = 125,202.51 : x
  2. Step 2: Convert to fraction form
    391,426.02/587,226.51 = 125,202.51/x
  3. Step 3: Cross multiply
    391,426.02x = 587,226.51 × 125,202.51
  4. Step 4: Simplify right side
    391,426.02x = 73,522,232,990.54
  5. Step 5: Solve for x
    x = 73,522,232,990.54/391,426.02
  6. Step 6: Final answer
    x = 187,831.75

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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.