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Finding the Fourth Proportional to 219.85, 328.46 and 170.10

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Solution

The fourth proportional to 219.85, 328.46 and 170.10 is: 254.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.85 : 328.46 = 170.10 : x
  2. Step 2: Convert to fraction form
    219.85/328.46 = 170.10/x
  3. Step 3: Cross multiply
    219.85x = 328.46 × 170.10
  4. Step 4: Simplify right side
    219.85x = 55,870.20
  5. Step 5: Solve for x
    x = 55,870.20/219.85
  6. Step 6: Final answer
    x = 254.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.