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Finding the Fourth Proportional to 342.48, 513.14 and 219.21

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Solution

The fourth proportional to 342.48, 513.14 and 219.21 is: 328.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.48 : 513.14 = 219.21 : x
  2. Step 2: Convert to fraction form
    342.48/513.14 = 219.21/x
  3. Step 3: Cross multiply
    342.48x = 513.14 × 219.21
  4. Step 4: Simplify right side
    342.48x = 112,482.40
  5. Step 5: Solve for x
    x = 112,482.40/342.48
  6. Step 6: Final answer
    x = 328.44

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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.