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Finding the Fourth Proportional to 42.64, 58.55 and 36.16

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Solution

The fourth proportional to 42.64, 58.55 and 36.16 is: 49.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.64 : 58.55 = 36.16 : x
  2. Step 2: Convert to fraction form
    42.64/58.55 = 36.16/x
  3. Step 3: Cross multiply
    42.64x = 58.55 × 36.16
  4. Step 4: Simplify right side
    42.64x = 2,117.17
  5. Step 5: Solve for x
    x = 2,117.17/42.64
  6. Step 6: Final answer
    x = 49.65

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.