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Finding the Fourth Proportional to 950.46, 1,312.47 and 689.82

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Solution

The fourth proportional to 950.46, 1,312.47 and 689.82 is: 952.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.46 : 1,312.47 = 689.82 : x
  2. Step 2: Convert to fraction form
    950.46/1,312.47 = 689.82/x
  3. Step 3: Cross multiply
    950.46x = 1,312.47 × 689.82
  4. Step 4: Simplify right side
    950.46x = 905,368.06
  5. Step 5: Solve for x
    x = 905,368.06/950.46
  6. Step 6: Final answer
    x = 952.56

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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.