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Finding the Fourth Proportional to 155.19, 215.28 and 146.99

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Solution

The fourth proportional to 155.19, 215.28 and 146.99 is: 203.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.19 : 215.28 = 146.99 : x
  2. Step 2: Convert to fraction form
    155.19/215.28 = 146.99/x
  3. Step 3: Cross multiply
    155.19x = 215.28 × 146.99
  4. Step 4: Simplify right side
    155.19x = 31,644.01
  5. Step 5: Solve for x
    x = 31,644.01/155.19
  6. Step 6: Final answer
    x = 203.90

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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.