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Finding the Fourth Proportional to 285,995.52, 428,435.20 and 187,200

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Solution

The fourth proportional to 285,995.52, 428,435.20 and 187,200 is: 280,434.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,995.52 : 428,435.20 = 187,200 : x
  2. Step 2: Convert to fraction form
    285,995.52/428,435.20 = 187,200/x
  3. Step 3: Cross multiply
    285,995.52x = 428,435.20 × 187,200
  4. Step 4: Simplify right side
    285,995.52x = 80,203,069,440
  5. Step 5: Solve for x
    x = 80,203,069,440/285,995.52
  6. Step 6: Final answer
    x = 280,434.71

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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.