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Finding the Fourth Proportional to 51.47, 71.03 and 30.75

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Solution

The fourth proportional to 51.47, 71.03 and 30.75 is: 42.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.47 : 71.03 = 30.75 : x
  2. Step 2: Convert to fraction form
    51.47/71.03 = 30.75/x
  3. Step 3: Cross multiply
    51.47x = 71.03 × 30.75
  4. Step 4: Simplify right side
    51.47x = 2,184.02
  5. Step 5: Solve for x
    x = 2,184.02/51.47
  6. Step 6: Final answer
    x = 42.44

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Find fourth proportional to 25.73, 35.51 and 15.38
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.