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Finding the Fourth Proportional to 945.27, 1,303.65 and 724.68

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Solution

The fourth proportional to 945.27, 1,303.65 and 724.68 is: 999.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.27 : 1,303.65 = 724.68 : x
  2. Step 2: Convert to fraction form
    945.27/1,303.65 = 724.68/x
  3. Step 3: Cross multiply
    945.27x = 1,303.65 × 724.68
  4. Step 4: Simplify right side
    945.27x = 944,729.08
  5. Step 5: Solve for x
    x = 944,729.08/945.27
  6. Step 6: Final answer
    x = 999.43

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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.