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Finding the Fourth Proportional to 307.47, 461.28 and 112.50

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Solution

The fourth proportional to 307.47, 461.28 and 112.50 is: 168.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.47 : 461.28 = 112.50 : x
  2. Step 2: Convert to fraction form
    307.47/461.28 = 112.50/x
  3. Step 3: Cross multiply
    307.47x = 461.28 × 112.50
  4. Step 4: Simplify right side
    307.47x = 51,894
  5. Step 5: Solve for x
    x = 51,894/307.47
  6. Step 6: Final answer
    x = 168.78

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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.