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Finding the Fourth Proportional to 1,269.28, 1,903.92 and 833.28

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Solution

The fourth proportional to 1,269.28, 1,903.92 and 833.28 is: 1,249.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,269.28 : 1,903.92 = 833.28 : x
  2. Step 2: Convert to fraction form
    1,269.28/1,903.92 = 833.28/x
  3. Step 3: Cross multiply
    1,269.28x = 1,903.92 × 833.28
  4. Step 4: Simplify right side
    1,269.28x = 1,586,498.46
  5. Step 5: Solve for x
    x = 1,586,498.46/1,269.28
  6. Step 6: Final answer
    x = 1,249.92

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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.