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Finding the Fourth Proportional to 48, 66.25 and 29.34

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Solution

The fourth proportional to 48, 66.25 and 29.34 is: 40.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    48 : 66.25 = 29.34 : x
  2. Step 2: Convert to fraction form
    48/66.25 = 29.34/x
  3. Step 3: Cross multiply
    48x = 66.25 × 29.34
  4. Step 4: Simplify right side
    48x = 1,943.78
  5. Step 5: Solve for x
    x = 1,943.78/48
  6. Step 6: Final answer
    x = 40.50

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1.5x scale

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.