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Finding the Fourth Proportional to 640,611.28, 960,166.36 and 261,295.28

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Solution

The fourth proportional to 640,611.28, 960,166.36 and 261,295.28 is: 391,636.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,611.28 : 960,166.36 = 261,295.28 : x
  2. Step 2: Convert to fraction form
    640,611.28/960,166.36 = 261,295.28/x
  3. Step 3: Cross multiply
    640,611.28x = 960,166.36 × 261,295.28
  4. Step 4: Simplify right side
    640,611.28x = 250,886,937,882.78
  5. Step 5: Solve for x
    x = 250,886,937,882.78/640,611.28
  6. Step 6: Final answer
    x = 391,636.78

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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.