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Finding the Fourth Proportional to 341.65, 512.43 and 220.45

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Solution

The fourth proportional to 341.65, 512.43 and 220.45 is: 330.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.65 : 512.43 = 220.45 : x
  2. Step 2: Convert to fraction form
    341.65/512.43 = 220.45/x
  3. Step 3: Cross multiply
    341.65x = 512.43 × 220.45
  4. Step 4: Simplify right side
    341.65x = 112,965.19
  5. Step 5: Solve for x
    x = 112,965.19/341.65
  6. Step 6: Final answer
    x = 330.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.