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Finding the Fourth Proportional to 40.95, 56.47 and 25.39

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Solution

The fourth proportional to 40.95, 56.47 and 25.39 is: 35.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.95 : 56.47 = 25.39 : x
  2. Step 2: Convert to fraction form
    40.95/56.47 = 25.39/x
  3. Step 3: Cross multiply
    40.95x = 56.47 × 25.39
  4. Step 4: Simplify right side
    40.95x = 1,433.77
  5. Step 5: Solve for x
    x = 1,433.77/40.95
  6. Step 6: Final answer
    x = 35.01

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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.