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Finding the Fourth Proportional to 683.76, 1,026.12 and 342

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Solution

The fourth proportional to 683.76, 1,026.12 and 342 is: 513.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.76 : 1,026.12 = 342 : x
  2. Step 2: Convert to fraction form
    683.76/1,026.12 = 342/x
  3. Step 3: Cross multiply
    683.76x = 1,026.12 × 342
  4. Step 4: Simplify right side
    683.76x = 350,933.04
  5. Step 5: Solve for x
    x = 350,933.04/683.76
  6. Step 6: Final answer
    x = 513.24

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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.