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Finding the Fourth Proportional to 391,712.80, 587,763.60 and 223,362.40

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Solution

The fourth proportional to 391,712.80, 587,763.60 and 223,362.40 is: 335,154.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,712.80 : 587,763.60 = 223,362.40 : x
  2. Step 2: Convert to fraction form
    391,712.80/587,763.60 = 223,362.40/x
  3. Step 3: Cross multiply
    391,712.80x = 587,763.60 × 223,362.40
  4. Step 4: Simplify right side
    391,712.80x = 131,284,288,328.64
  5. Step 5: Solve for x
    x = 131,284,288,328.64/391,712.80
  6. Step 6: Final answer
    x = 335,154.45

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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.