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Finding the Fourth Proportional to 950.72, 1,313.16 and 688.32

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Solution

The fourth proportional to 950.72, 1,313.16 and 688.32 is: 950.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.72 : 1,313.16 = 688.32 : x
  2. Step 2: Convert to fraction form
    950.72/1,313.16 = 688.32/x
  3. Step 3: Cross multiply
    950.72x = 1,313.16 × 688.32
  4. Step 4: Simplify right side
    950.72x = 903,874.29
  5. Step 5: Solve for x
    x = 903,874.29/950.72
  6. Step 6: Final answer
    x = 950.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.