Home / 1,511.36-2,266.12-688.85

Finding the Fourth Proportional to 1,511.36, 2,266.12 and 688.85

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Solution

The fourth proportional to 1,511.36, 2,266.12 and 688.85 is: 1,032.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.36 : 2,266.12 = 688.85 : x
  2. Step 2: Convert to fraction form
    1,511.36/2,266.12 = 688.85/x
  3. Step 3: Cross multiply
    1,511.36x = 2,266.12 × 688.85
  4. Step 4: Simplify right side
    1,511.36x = 1,561,013.32
  5. Step 5: Solve for x
    x = 1,561,013.32/1,511.36
  6. Step 6: Final answer
    x = 1,032.86

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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.