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Finding the Fourth Proportional to 58.39, 87.40 and 40.26

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Solution

The fourth proportional to 58.39, 87.40 and 40.26 is: 60.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.39 : 87.40 = 40.26 : x
  2. Step 2: Convert to fraction form
    58.39/87.40 = 40.26/x
  3. Step 3: Cross multiply
    58.39x = 87.40 × 40.26
  4. Step 4: Simplify right side
    58.39x = 3,518.72
  5. Step 5: Solve for x
    x = 3,518.72/58.39
  6. Step 6: Final answer
    x = 60.26

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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.