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Finding the Fourth Proportional to 938.84, 1,295.34 and 607.28

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Solution

The fourth proportional to 938.84, 1,295.34 and 607.28 is: 837.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.84 : 1,295.34 = 607.28 : x
  2. Step 2: Convert to fraction form
    938.84/1,295.34 = 607.28/x
  3. Step 3: Cross multiply
    938.84x = 1,295.34 × 607.28
  4. Step 4: Simplify right side
    938.84x = 786,634.08
  5. Step 5: Solve for x
    x = 786,634.08/938.84
  6. Step 6: Final answer
    x = 837.88

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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.