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Finding the Fourth Proportional to 640,279.92, 960,419.76 and 219,559.44

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Solution

The fourth proportional to 640,279.92, 960,419.76 and 219,559.44 is: 329,339.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,279.92 : 960,419.76 = 219,559.44 : x
  2. Step 2: Convert to fraction form
    640,279.92/960,419.76 = 219,559.44/x
  3. Step 3: Cross multiply
    640,279.92x = 960,419.76 × 219,559.44
  4. Step 4: Simplify right side
    640,279.92x = 210,869,224,670.53
  5. Step 5: Solve for x
    x = 210,869,224,670.53/640,279.92
  6. Step 6: Final answer
    x = 329,339.12

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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.