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Finding the Fourth Proportional to 699.16, 1,047.84 and 308.68

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Solution

The fourth proportional to 699.16, 1,047.84 and 308.68 is: 462.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.16 : 1,047.84 = 308.68 : x
  2. Step 2: Convert to fraction form
    699.16/1,047.84 = 308.68/x
  3. Step 3: Cross multiply
    699.16x = 1,047.84 × 308.68
  4. Step 4: Simplify right side
    699.16x = 323,447.25
  5. Step 5: Solve for x
    x = 323,447.25/699.16
  6. Step 6: Final answer
    x = 462.62

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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.