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Finding the Fourth Proportional to 945.27, 1,303.70 and 724.75

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Solution

The fourth proportional to 945.27, 1,303.70 and 724.75 is: 999.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.27 : 1,303.70 = 724.75 : x
  2. Step 2: Convert to fraction form
    945.27/1,303.70 = 724.75/x
  3. Step 3: Cross multiply
    945.27x = 1,303.70 × 724.75
  4. Step 4: Simplify right side
    945.27x = 944,849.69
  5. Step 5: Solve for x
    x = 944,849.69/945.27
  6. Step 6: Final answer
    x = 999.56

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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.