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Finding the Fourth Proportional to 950.35, 1,311.06 and 618.70

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Solution

The fourth proportional to 950.35, 1,311.06 and 618.70 is: 853.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.35 : 1,311.06 = 618.70 : x
  2. Step 2: Convert to fraction form
    950.35/1,311.06 = 618.70/x
  3. Step 3: Cross multiply
    950.35x = 1,311.06 × 618.70
  4. Step 4: Simplify right side
    950.35x = 811,152.82
  5. Step 5: Solve for x
    x = 811,152.82/950.35
  6. Step 6: Final answer
    x = 853.53

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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.