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Finding the Fourth Proportional to 210.67, 315.95 and 88.87

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Solution

The fourth proportional to 210.67, 315.95 and 88.87 is: 133.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.67 : 315.95 = 88.87 : x
  2. Step 2: Convert to fraction form
    210.67/315.95 = 88.87/x
  3. Step 3: Cross multiply
    210.67x = 315.95 × 88.87
  4. Step 4: Simplify right side
    210.67x = 28,078.48
  5. Step 5: Solve for x
    x = 28,078.48/210.67
  6. Step 6: Final answer
    x = 133.28

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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.