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Finding the Fourth Proportional to 950.70, 1,419.17 and 821.53

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Solution

The fourth proportional to 950.70, 1,419.17 and 821.53 is: 1,226.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.70 : 1,419.17 = 821.53 : x
  2. Step 2: Convert to fraction form
    950.70/1,419.17 = 821.53/x
  3. Step 3: Cross multiply
    950.70x = 1,419.17 × 821.53
  4. Step 4: Simplify right side
    950.70x = 1,165,883.07
  5. Step 5: Solve for x
    x = 1,165,883.07/950.70
  6. Step 6: Final answer
    x = 1,226.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.