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Finding the Fourth Proportional to 391,318.60, 587,237.10 and 222,838.60

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Solution

The fourth proportional to 391,318.60, 587,237.10 and 222,838.60 is: 334,405.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,318.60 : 587,237.10 = 222,838.60 : x
  2. Step 2: Convert to fraction form
    391,318.60/587,237.10 = 222,838.60/x
  3. Step 3: Cross multiply
    391,318.60x = 587,237.10 × 222,838.60
  4. Step 4: Simplify right side
    391,318.60x = 130,859,093,232.06
  5. Step 5: Solve for x
    x = 130,859,093,232.06/391,318.60
  6. Step 6: Final answer
    x = 334,405.50

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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.