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Finding the Fourth Proportional to 640,207.76, 960,444.23 and 261,129.56

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Solution

The fourth proportional to 640,207.76, 960,444.23 and 261,129.56 is: 391,748.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,207.76 : 960,444.23 = 261,129.56 : x
  2. Step 2: Convert to fraction form
    640,207.76/960,444.23 = 261,129.56/x
  3. Step 3: Cross multiply
    640,207.76x = 960,444.23 × 261,129.56
  4. Step 4: Simplify right side
    640,207.76x = 250,800,373,076.57
  5. Step 5: Solve for x
    x = 250,800,373,076.57/640,207.76
  6. Step 6: Final answer
    x = 391,748.41

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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.