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Finding the Fourth Proportional to 51.29, 70.75 and 29.45

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Solution

The fourth proportional to 51.29, 70.75 and 29.45 is: 40.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.29 : 70.75 = 29.45 : x
  2. Step 2: Convert to fraction form
    51.29/70.75 = 29.45/x
  3. Step 3: Cross multiply
    51.29x = 70.75 × 29.45
  4. Step 4: Simplify right side
    51.29x = 2,083.59
  5. Step 5: Solve for x
    x = 2,083.59/51.29
  6. Step 6: Final answer
    x = 40.62

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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.