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Finding the Fourth Proportional to 618.84, 930.29 and 613.98

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Solution

The fourth proportional to 618.84, 930.29 and 613.98 is: 922.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.84 : 930.29 = 613.98 : x
  2. Step 2: Convert to fraction form
    618.84/930.29 = 613.98/x
  3. Step 3: Cross multiply
    618.84x = 930.29 × 613.98
  4. Step 4: Simplify right side
    618.84x = 571,176.38
  5. Step 5: Solve for x
    x = 571,176.38/618.84
  6. Step 6: Final answer
    x = 922.98

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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.