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Finding the Fourth Proportional to 155.55, 215.64 and 147.33

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Solution

The fourth proportional to 155.55, 215.64 and 147.33 is: 204.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.55 : 215.64 = 147.33 : x
  2. Step 2: Convert to fraction form
    155.55/215.64 = 147.33/x
  3. Step 3: Cross multiply
    155.55x = 215.64 × 147.33
  4. Step 4: Simplify right side
    155.55x = 31,770.24
  5. Step 5: Solve for x
    x = 31,770.24/155.55
  6. Step 6: Final answer
    x = 204.24

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.