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Finding the Fourth Proportional to 653.95, 980.37 and 379.71

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Solution

The fourth proportional to 653.95, 980.37 and 379.71 is: 569.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.95 : 980.37 = 379.71 : x
  2. Step 2: Convert to fraction form
    653.95/980.37 = 379.71/x
  3. Step 3: Cross multiply
    653.95x = 980.37 × 379.71
  4. Step 4: Simplify right side
    653.95x = 372,256.29
  5. Step 5: Solve for x
    x = 372,256.29/653.95
  6. Step 6: Final answer
    x = 569.24

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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.