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Finding the Fourth Proportional to 1,786.92, 2,680.71 and 554.23

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Solution

The fourth proportional to 1,786.92, 2,680.71 and 554.23 is: 831.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.92 : 2,680.71 = 554.23 : x
  2. Step 2: Convert to fraction form
    1,786.92/2,680.71 = 554.23/x
  3. Step 3: Cross multiply
    1,786.92x = 2,680.71 × 554.23
  4. Step 4: Simplify right side
    1,786.92x = 1,485,729.90
  5. Step 5: Solve for x
    x = 1,485,729.90/1,786.92
  6. Step 6: Final answer
    x = 831.45

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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.