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Finding the Fourth Proportional to 953.96, 1,431.42 and 699.56

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Solution

The fourth proportional to 953.96, 1,431.42 and 699.56 is: 1,049.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.96 : 1,431.42 = 699.56 : x
  2. Step 2: Convert to fraction form
    953.96/1,431.42 = 699.56/x
  3. Step 3: Cross multiply
    953.96x = 1,431.42 × 699.56
  4. Step 4: Simplify right side
    953.96x = 1,001,364.18
  5. Step 5: Solve for x
    x = 1,001,364.18/953.96
  6. Step 6: Final answer
    x = 1,049.69

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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.