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Finding the Fourth Proportional to 927.03, 1,395.95 and 685.25

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Solution

The fourth proportional to 927.03, 1,395.95 and 685.25 is: 1,031.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.03 : 1,395.95 = 685.25 : x
  2. Step 2: Convert to fraction form
    927.03/1,395.95 = 685.25/x
  3. Step 3: Cross multiply
    927.03x = 1,395.95 × 685.25
  4. Step 4: Simplify right side
    927.03x = 956,564.33
  5. Step 5: Solve for x
    x = 956,564.33/927.03
  6. Step 6: Final answer
    x = 1,031.86

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.