Home / 1,511.38-2,267.60-645.76

Finding the Fourth Proportional to 1,511.38, 2,267.60 and 645.76

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Solution

The fourth proportional to 1,511.38, 2,267.60 and 645.76 is: 968.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.38 : 2,267.60 = 645.76 : x
  2. Step 2: Convert to fraction form
    1,511.38/2,267.60 = 645.76/x
  3. Step 3: Cross multiply
    1,511.38x = 2,267.60 × 645.76
  4. Step 4: Simplify right side
    1,511.38x = 1,464,325.38
  5. Step 5: Solve for x
    x = 1,464,325.38/1,511.38
  6. Step 6: Final answer
    x = 968.87

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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.