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Finding the Fourth Proportional to 42.84, 64.26 and 35.19

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Solution

The fourth proportional to 42.84, 64.26 and 35.19 is: 52.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.84 : 64.26 = 35.19 : x
  2. Step 2: Convert to fraction form
    42.84/64.26 = 35.19/x
  3. Step 3: Cross multiply
    42.84x = 64.26 × 35.19
  4. Step 4: Simplify right side
    42.84x = 2,261.31
  5. Step 5: Solve for x
    x = 2,261.31/42.84
  6. Step 6: Final answer
    x = 52.79

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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.