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Finding the Fourth Proportional to 618.97, 928.63 and 310.45

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Solution

The fourth proportional to 618.97, 928.63 and 310.45 is: 465.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.97 : 928.63 = 310.45 : x
  2. Step 2: Convert to fraction form
    618.97/928.63 = 310.45/x
  3. Step 3: Cross multiply
    618.97x = 928.63 × 310.45
  4. Step 4: Simplify right side
    618.97x = 288,293.18
  5. Step 5: Solve for x
    x = 288,293.18/618.97
  6. Step 6: Final answer
    x = 465.76

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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.