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Finding the Fourth Proportional to 653.57, 980.03 and 379.74

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Solution

The fourth proportional to 653.57, 980.03 and 379.74 is: 569.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.57 : 980.03 = 379.74 : x
  2. Step 2: Convert to fraction form
    653.57/980.03 = 379.74/x
  3. Step 3: Cross multiply
    653.57x = 980.03 × 379.74
  4. Step 4: Simplify right side
    653.57x = 372,157.54
  5. Step 5: Solve for x
    x = 372,157.54/653.57
  6. Step 6: Final answer
    x = 569.43

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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.