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Finding the Fourth Proportional to 42.94, 64.36 and 23.66

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Solution

The fourth proportional to 42.94, 64.36 and 23.66 is: 35.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.94 : 64.36 = 23.66 : x
  2. Step 2: Convert to fraction form
    42.94/64.36 = 23.66/x
  3. Step 3: Cross multiply
    42.94x = 64.36 × 23.66
  4. Step 4: Simplify right side
    42.94x = 1,522.95
  5. Step 5: Solve for x
    x = 1,522.95/42.94
  6. Step 6: Final answer
    x = 35.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.