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Finding the Fourth Proportional to 220.65, 304.13 and 155.04

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Solution

The fourth proportional to 220.65, 304.13 and 155.04 is: 213.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.65 : 304.13 = 155.04 : x
  2. Step 2: Convert to fraction form
    220.65/304.13 = 155.04/x
  3. Step 3: Cross multiply
    220.65x = 304.13 × 155.04
  4. Step 4: Simplify right side
    220.65x = 47,152.32
  5. Step 5: Solve for x
    x = 47,152.32/220.65
  6. Step 6: Final answer
    x = 213.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.