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Finding the Fourth Proportional to 42.64, 58.83 and 25.15

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Solution

The fourth proportional to 42.64, 58.83 and 25.15 is: 34.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.64 : 58.83 = 25.15 : x
  2. Step 2: Convert to fraction form
    42.64/58.83 = 25.15/x
  3. Step 3: Cross multiply
    42.64x = 58.83 × 25.15
  4. Step 4: Simplify right side
    42.64x = 1,479.57
  5. Step 5: Solve for x
    x = 1,479.57/42.64
  6. Step 6: Final answer
    x = 34.70

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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.