Home / 1,513.28-2,269.64-691.36

Finding the Fourth Proportional to 1,513.28, 2,269.64 and 691.36

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Solution

The fourth proportional to 1,513.28, 2,269.64 and 691.36 is: 1,036.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,513.28 : 2,269.64 = 691.36 : x
  2. Step 2: Convert to fraction form
    1,513.28/2,269.64 = 691.36/x
  3. Step 3: Cross multiply
    1,513.28x = 2,269.64 × 691.36
  4. Step 4: Simplify right side
    1,513.28x = 1,569,138.31
  5. Step 5: Solve for x
    x = 1,569,138.31/1,513.28
  6. Step 6: Final answer
    x = 1,036.91

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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.