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Finding the Fourth Proportional to 58.99, 81.40 and 34.42

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Solution

The fourth proportional to 58.99, 81.40 and 34.42 is: 47.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.99 : 81.40 = 34.42 : x
  2. Step 2: Convert to fraction form
    58.99/81.40 = 34.42/x
  3. Step 3: Cross multiply
    58.99x = 81.40 × 34.42
  4. Step 4: Simplify right side
    58.99x = 2,801.21
  5. Step 5: Solve for x
    x = 2,801.21/58.99
  6. Step 6: Final answer
    x = 47.49

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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.