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Finding the Fourth Proportional to 874.11, 1,310.78 and 463.15

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Solution

The fourth proportional to 874.11, 1,310.78 and 463.15 is: 694.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.11 : 1,310.78 = 463.15 : x
  2. Step 2: Convert to fraction form
    874.11/1,310.78 = 463.15/x
  3. Step 3: Cross multiply
    874.11x = 1,310.78 × 463.15
  4. Step 4: Simplify right side
    874.11x = 607,088.60
  5. Step 5: Solve for x
    x = 607,088.60/874.11
  6. Step 6: Final answer
    x = 694.52

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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.