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Finding the Fourth Proportional to 618.03, 928.13 and 613.31

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Solution

The fourth proportional to 618.03, 928.13 and 613.31 is: 921.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.03 : 928.13 = 613.31 : x
  2. Step 2: Convert to fraction form
    618.03/928.13 = 613.31/x
  3. Step 3: Cross multiply
    618.03x = 928.13 × 613.31
  4. Step 4: Simplify right side
    618.03x = 569,223.70
  5. Step 5: Solve for x
    x = 569,223.70/618.03
  6. Step 6: Final answer
    x = 921.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.