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Finding the Fourth Proportional to 937.44, 1,290.96 and 918.30

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Solution

The fourth proportional to 937.44, 1,290.96 and 918.30 is: 1,264.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.44 : 1,290.96 = 918.30 : x
  2. Step 2: Convert to fraction form
    937.44/1,290.96 = 918.30/x
  3. Step 3: Cross multiply
    937.44x = 1,290.96 × 918.30
  4. Step 4: Simplify right side
    937.44x = 1,185,488.57
  5. Step 5: Solve for x
    x = 1,185,488.57/937.44
  6. Step 6: Final answer
    x = 1,264.60

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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.