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Finding the Fourth Proportional to 944.28, 1,302.40 and 664.23

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Solution

The fourth proportional to 944.28, 1,302.40 and 664.23 is: 916.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    944.28 : 1,302.40 = 664.23 : x
  2. Step 2: Convert to fraction form
    944.28/1,302.40 = 664.23/x
  3. Step 3: Cross multiply
    944.28x = 1,302.40 × 664.23
  4. Step 4: Simplify right side
    944.28x = 865,089.75
  5. Step 5: Solve for x
    x = 865,089.75/944.28
  6. Step 6: Final answer
    x = 916.13

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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.