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Finding the Fourth Proportional to 219.64, 302.87 and 153.32

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Solution

The fourth proportional to 219.64, 302.87 and 153.32 is: 211.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.64 : 302.87 = 153.32 : x
  2. Step 2: Convert to fraction form
    219.64/302.87 = 153.32/x
  3. Step 3: Cross multiply
    219.64x = 302.87 × 153.32
  4. Step 4: Simplify right side
    219.64x = 46,436.03
  5. Step 5: Solve for x
    x = 46,436.03/219.64
  6. Step 6: Final answer
    x = 211.42

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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.