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Finding the Fourth Proportional to 287,937.79, 431,283.35 and 187,794.18

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Solution

The fourth proportional to 287,937.79, 431,283.35 and 187,794.18 is: 281,284.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,937.79 : 431,283.35 = 187,794.18 : x
  2. Step 2: Convert to fraction form
    287,937.79/431,283.35 = 187,794.18/x
  3. Step 3: Cross multiply
    287,937.79x = 431,283.35 × 187,794.18
  4. Step 4: Simplify right side
    287,937.79x = 80,992,503,530.39
  5. Step 5: Solve for x
    x = 80,992,503,530.39/287,937.79
  6. Step 6: Final answer
    x = 281,284.73

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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.