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Finding the Fourth Proportional to 943.29, 1,415.61 and 699.08

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Solution

The fourth proportional to 943.29, 1,415.61 and 699.08 is: 1,049.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.29 : 1,415.61 = 699.08 : x
  2. Step 2: Convert to fraction form
    943.29/1,415.61 = 699.08/x
  3. Step 3: Cross multiply
    943.29x = 1,415.61 × 699.08
  4. Step 4: Simplify right side
    943.29x = 989,624.64
  5. Step 5: Solve for x
    x = 989,624.64/943.29
  6. Step 6: Final answer
    x = 1,049.12

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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.