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Finding the Fourth Proportional to 640,672.20, 959,696.10 and 325,306.80

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Solution

The fourth proportional to 640,672.20, 959,696.10 and 325,306.80 is: 487,293.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,672.20 : 959,696.10 = 325,306.80 : x
  2. Step 2: Convert to fraction form
    640,672.20/959,696.10 = 325,306.80/x
  3. Step 3: Cross multiply
    640,672.20x = 959,696.10 × 325,306.80
  4. Step 4: Simplify right side
    640,672.20x = 312,195,667,263.48
  5. Step 5: Solve for x
    x = 312,195,667,263.48/640,672.20
  6. Step 6: Final answer
    x = 487,293.92

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1.5x scale

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.