Home / 1,921.19-2,882.16-688.27

Finding the Fourth Proportional to 1,921.19, 2,882.16 and 688.27

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Solution

The fourth proportional to 1,921.19, 2,882.16 and 688.27 is: 1,032.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.19 : 2,882.16 = 688.27 : x
  2. Step 2: Convert to fraction form
    1,921.19/2,882.16 = 688.27/x
  3. Step 3: Cross multiply
    1,921.19x = 2,882.16 × 688.27
  4. Step 4: Simplify right side
    1,921.19x = 1,983,697.06
  5. Step 5: Solve for x
    x = 1,983,697.06/1,921.19
  6. Step 6: Final answer
    x = 1,032.54

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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.