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Finding the Fourth Proportional to 828.71, 1,242.95 and 341.69

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Solution

The fourth proportional to 828.71, 1,242.95 and 341.69 is: 512.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    828.71 : 1,242.95 = 341.69 : x
  2. Step 2: Convert to fraction form
    828.71/1,242.95 = 341.69/x
  3. Step 3: Cross multiply
    828.71x = 1,242.95 × 341.69
  4. Step 4: Simplify right side
    828.71x = 424,703.59
  5. Step 5: Solve for x
    x = 424,703.59/828.71
  6. Step 6: Final answer
    x = 512.49

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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.