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Finding the Fourth Proportional to 40.40, 55.79 and 29.51

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Solution

The fourth proportional to 40.40, 55.79 and 29.51 is: 40.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.40 : 55.79 = 29.51 : x
  2. Step 2: Convert to fraction form
    40.40/55.79 = 29.51/x
  3. Step 3: Cross multiply
    40.40x = 55.79 × 29.51
  4. Step 4: Simplify right side
    40.40x = 1,646.57
  5. Step 5: Solve for x
    x = 1,646.57/40.40
  6. Step 6: Final answer
    x = 40.76

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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.