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Finding the Fourth Proportional to 618.68, 928.07 and 289.52

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Solution

The fourth proportional to 618.68, 928.07 and 289.52 is: 434.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.68 : 928.07 = 289.52 : x
  2. Step 2: Convert to fraction form
    618.68/928.07 = 289.52/x
  3. Step 3: Cross multiply
    618.68x = 928.07 × 289.52
  4. Step 4: Simplify right side
    618.68x = 268,690.91
  5. Step 5: Solve for x
    x = 268,690.91/618.68
  6. Step 6: Final answer
    x = 434.30

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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.