Home / 868,989.78-1,199,255.22-487,041.21

Finding the Fourth Proportional to 868,989.78, 1,199,255.22 and 487,041.21

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Solution

The fourth proportional to 868,989.78, 1,199,255.22 and 487,041.21 is: 672,144.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,989.78 : 1,199,255.22 = 487,041.21 : x
  2. Step 2: Convert to fraction form
    868,989.78/1,199,255.22 = 487,041.21/x
  3. Step 3: Cross multiply
    868,989.78x = 1,199,255.22 × 487,041.21
  4. Step 4: Simplify right side
    868,989.78x = 584,086,713,447.62
  5. Step 5: Solve for x
    x = 584,086,713,447.62/868,989.78
  6. Step 6: Final answer
    x = 672,144.51

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.