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Finding the Fourth Proportional to 391,258.60, 587,147.10 and 222,778.60

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Solution

The fourth proportional to 391,258.60, 587,147.10 and 222,778.60 is: 334,315.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,258.60 : 587,147.10 = 222,778.60 : x
  2. Step 2: Convert to fraction form
    391,258.60/587,147.10 = 222,778.60/x
  3. Step 3: Cross multiply
    391,258.60x = 587,147.10 × 222,778.60
  4. Step 4: Simplify right side
    391,258.60x = 130,803,808,932.06
  5. Step 5: Solve for x
    x = 130,803,808,932.06/391,258.60
  6. Step 6: Final answer
    x = 334,315.49

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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.