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Finding the Fourth Proportional to 950.88, 1,312.44 and 688.84

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Solution

The fourth proportional to 950.88, 1,312.44 and 688.84 is: 950.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.88 : 1,312.44 = 688.84 : x
  2. Step 2: Convert to fraction form
    950.88/1,312.44 = 688.84/x
  3. Step 3: Cross multiply
    950.88x = 1,312.44 × 688.84
  4. Step 4: Simplify right side
    950.88x = 904,061.17
  5. Step 5: Solve for x
    x = 904,061.17/950.88
  6. Step 6: Final answer
    x = 950.76

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1.5x scale

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.