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Finding the Fourth Proportional to 287,251.20, 430,876.80 and 187,718.40

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Solution

The fourth proportional to 287,251.20, 430,876.80 and 187,718.40 is: 281,577.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,251.20 : 430,876.80 = 187,718.40 : x
  2. Step 2: Convert to fraction form
    287,251.20/430,876.80 = 187,718.40/x
  3. Step 3: Cross multiply
    287,251.20x = 430,876.80 × 187,718.40
  4. Step 4: Simplify right side
    287,251.20x = 80,883,503,493.12
  5. Step 5: Solve for x
    x = 80,883,503,493.12/287,251.20
  6. Step 6: Final answer
    x = 281,577.60

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1.5x scale

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.