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Finding the Fourth Proportional to 159.23, 220.59 and 155.45

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Solution

The fourth proportional to 159.23, 220.59 and 155.45 is: 215.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.23 : 220.59 = 155.45 : x
  2. Step 2: Convert to fraction form
    159.23/220.59 = 155.45/x
  3. Step 3: Cross multiply
    159.23x = 220.59 × 155.45
  4. Step 4: Simplify right side
    159.23x = 34,290.72
  5. Step 5: Solve for x
    x = 34,290.72/159.23
  6. Step 6: Final answer
    x = 215.35

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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.