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Finding the Fourth Proportional to 950.34, 1,311.54 and 618.81

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Solution

The fourth proportional to 950.34, 1,311.54 and 618.81 is: 854.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.34 : 1,311.54 = 618.81 : x
  2. Step 2: Convert to fraction form
    950.34/1,311.54 = 618.81/x
  3. Step 3: Cross multiply
    950.34x = 1,311.54 × 618.81
  4. Step 4: Simplify right side
    950.34x = 811,594.07
  5. Step 5: Solve for x
    x = 811,594.07/950.34
  6. Step 6: Final answer
    x = 854.00

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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.