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Finding the Fourth Proportional to 51.33, 70.85 and 29.51

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Solution

The fourth proportional to 51.33, 70.85 and 29.51 is: 40.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.33 : 70.85 = 29.51 : x
  2. Step 2: Convert to fraction form
    51.33/70.85 = 29.51/x
  3. Step 3: Cross multiply
    51.33x = 70.85 × 29.51
  4. Step 4: Simplify right side
    51.33x = 2,090.28
  5. Step 5: Solve for x
    x = 2,090.28/51.33
  6. Step 6: Final answer
    x = 40.72

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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.