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Finding the Fourth Proportional to 287,319.60, 429,958.80 and 250,286.40

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Solution

The fourth proportional to 287,319.60, 429,958.80 and 250,286.40 is: 374,540.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,319.60 : 429,958.80 = 250,286.40 : x
  2. Step 2: Convert to fraction form
    287,319.60/429,958.80 = 250,286.40/x
  3. Step 3: Cross multiply
    287,319.60x = 429,958.80 × 250,286.40
  4. Step 4: Simplify right side
    287,319.60x = 107,612,840,200.32
  5. Step 5: Solve for x
    x = 107,612,840,200.32/287,319.60
  6. Step 6: Final answer
    x = 374,540.55

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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.