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Finding the Fourth Proportional to 653.54, 979.42 and 479.38

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Solution

The fourth proportional to 653.54, 979.42 and 479.38 is: 718.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.54 : 979.42 = 479.38 : x
  2. Step 2: Convert to fraction form
    653.54/979.42 = 479.38/x
  3. Step 3: Cross multiply
    653.54x = 979.42 × 479.38
  4. Step 4: Simplify right side
    653.54x = 469,514.36
  5. Step 5: Solve for x
    x = 469,514.36/653.54
  6. Step 6: Final answer
    x = 718.42

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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.