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Finding the Fourth Proportional to 51.48, 71.06 and 30.76

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Solution

The fourth proportional to 51.48, 71.06 and 30.76 is: 42.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.48 : 71.06 = 30.76 : x
  2. Step 2: Convert to fraction form
    51.48/71.06 = 30.76/x
  3. Step 3: Cross multiply
    51.48x = 71.06 × 30.76
  4. Step 4: Simplify right side
    51.48x = 2,185.82
  5. Step 5: Solve for x
    x = 2,185.82/51.48
  6. Step 6: Final answer
    x = 42.46

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Find fourth proportional to 25.74, 35.53 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.