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Finding the Fourth Proportional to 155.13, 212.66 and 152.37

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Solution

The fourth proportional to 155.13, 212.66 and 152.37 is: 208.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.13 : 212.66 = 152.37 : x
  2. Step 2: Convert to fraction form
    155.13/212.66 = 152.37/x
  3. Step 3: Cross multiply
    155.13x = 212.66 × 152.37
  4. Step 4: Simplify right side
    155.13x = 32,402.24
  5. Step 5: Solve for x
    x = 32,402.24/155.13
  6. Step 6: Final answer
    x = 208.87

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.