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Finding the Fourth Proportional to 2,859.11, 4,287.58 and 984.47

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Solution

The fourth proportional to 2,859.11, 4,287.58 and 984.47 is: 1,476.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,859.11 : 4,287.58 = 984.47 : x
  2. Step 2: Convert to fraction form
    2,859.11/4,287.58 = 984.47/x
  3. Step 3: Cross multiply
    2,859.11x = 4,287.58 × 984.47
  4. Step 4: Simplify right side
    2,859.11x = 4,220,981.55
  5. Step 5: Solve for x
    x = 4,220,981.55/2,859.11
  6. Step 6: Final answer
    x = 1,476.33

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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.