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Finding the Fourth Proportional to 155.55, 215.67 and 147.35

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Solution

The fourth proportional to 155.55, 215.67 and 147.35 is: 204.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.55 : 215.67 = 147.35 : x
  2. Step 2: Convert to fraction form
    155.55/215.67 = 147.35/x
  3. Step 3: Cross multiply
    155.55x = 215.67 × 147.35
  4. Step 4: Simplify right side
    155.55x = 31,777.90
  5. Step 5: Solve for x
    x = 31,777.90/155.55
  6. Step 6: Final answer
    x = 204.29

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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.