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Finding the Fourth Proportional to 640,574.20, 960,971.82 and 261,700.84

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Solution

The fourth proportional to 640,574.20, 960,971.82 and 261,700.84 is: 392,596.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,574.20 : 960,971.82 = 261,700.84 : x
  2. Step 2: Convert to fraction form
    640,574.20/960,971.82 = 261,700.84/x
  3. Step 3: Cross multiply
    640,574.20x = 960,971.82 × 261,700.84
  4. Step 4: Simplify right side
    640,574.20x = 251,487,132,510.33
  5. Step 5: Solve for x
    x = 251,487,132,510.33/640,574.20
  6. Step 6: Final answer
    x = 392,596.41

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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.