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Finding the Fourth Proportional to 640,249.92, 883,535.04 and 353,764.80

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Solution

The fourth proportional to 640,249.92, 883,535.04 and 353,764.80 is: 488,189.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,249.92 : 883,535.04 = 353,764.80 : x
  2. Step 2: Convert to fraction form
    640,249.92/883,535.04 = 353,764.80/x
  3. Step 3: Cross multiply
    640,249.92x = 883,535.04 × 353,764.80
  4. Step 4: Simplify right side
    640,249.92x = 312,563,596,718.59
  5. Step 5: Solve for x
    x = 312,563,596,718.59/640,249.92
  6. Step 6: Final answer
    x = 488,189.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.