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Finding the Fourth Proportional to 58.89, 88.24 and 28.40

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Solution

The fourth proportional to 58.89, 88.24 and 28.40 is: 42.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.89 : 88.24 = 28.40 : x
  2. Step 2: Convert to fraction form
    58.89/88.24 = 28.40/x
  3. Step 3: Cross multiply
    58.89x = 88.24 × 28.40
  4. Step 4: Simplify right side
    58.89x = 2,506.05
  5. Step 5: Solve for x
    x = 2,506.05/58.89
  6. Step 6: Final answer
    x = 42.55

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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.