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Finding the Fourth Proportional to 640,856.80, 961,855.44 and 341,584.48

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Solution

The fourth proportional to 640,856.80, 961,855.44 and 341,584.48 is: 512,680.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,856.80 : 961,855.44 = 341,584.48 : x
  2. Step 2: Convert to fraction form
    640,856.80/961,855.44 = 341,584.48/x
  3. Step 3: Cross multiply
    640,856.80x = 961,855.44 × 341,584.48
  4. Step 4: Simplify right side
    640,856.80x = 328,554,890,307.57
  5. Step 5: Solve for x
    x = 328,554,890,307.57/640,856.80
  6. Step 6: Final answer
    x = 512,680.66

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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.