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Finding the Fourth Proportional to 653.07, 979.28 and 379.23

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Solution

The fourth proportional to 653.07, 979.28 and 379.23 is: 568.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.07 : 979.28 = 379.23 : x
  2. Step 2: Convert to fraction form
    653.07/979.28 = 379.23/x
  3. Step 3: Cross multiply
    653.07x = 979.28 × 379.23
  4. Step 4: Simplify right side
    653.07x = 371,368.41
  5. Step 5: Solve for x
    x = 371,368.41/653.07
  6. Step 6: Final answer
    x = 568.65

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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.