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Finding the Fourth Proportional to 653.11, 979.13 and 448.08

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Solution

The fourth proportional to 653.11, 979.13 and 448.08 is: 671.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.11 : 979.13 = 448.08 : x
  2. Step 2: Convert to fraction form
    653.11/979.13 = 448.08/x
  3. Step 3: Cross multiply
    653.11x = 979.13 × 448.08
  4. Step 4: Simplify right side
    653.11x = 438,728.57
  5. Step 5: Solve for x
    x = 438,728.57/653.11
  6. Step 6: Final answer
    x = 671.75

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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.