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Finding the Fourth Proportional to 937, 1,393.55 and 918.56

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Solution

The fourth proportional to 937, 1,393.55 and 918.56 is: 1,366.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    937 : 1,393.55 = 918.56 : x
  2. Step 2: Convert to fraction form
    937/1,393.55 = 918.56/x
  3. Step 3: Cross multiply
    937x = 1,393.55 × 918.56
  4. Step 4: Simplify right side
    937x = 1,280,059.29
  5. Step 5: Solve for x
    x = 1,280,059.29/937
  6. Step 6: Final answer
    x = 1,366.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.