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Finding the Fourth Proportional to 688.42, 1,032.96 and 341.79

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Solution

The fourth proportional to 688.42, 1,032.96 and 341.79 is: 512.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.42 : 1,032.96 = 341.79 : x
  2. Step 2: Convert to fraction form
    688.42/1,032.96 = 341.79/x
  3. Step 3: Cross multiply
    688.42x = 1,032.96 × 341.79
  4. Step 4: Simplify right side
    688.42x = 353,055.40
  5. Step 5: Solve for x
    x = 353,055.40/688.42
  6. Step 6: Final answer
    x = 512.85

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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.