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Finding the Fourth Proportional to 1,328.38, 1,833.09 and 738.91

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Solution

The fourth proportional to 1,328.38, 1,833.09 and 738.91 is: 1,019.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.38 : 1,833.09 = 738.91 : x
  2. Step 2: Convert to fraction form
    1,328.38/1,833.09 = 738.91/x
  3. Step 3: Cross multiply
    1,328.38x = 1,833.09 × 738.91
  4. Step 4: Simplify right side
    1,328.38x = 1,354,479.37
  5. Step 5: Solve for x
    x = 1,354,479.37/1,328.38
  6. Step 6: Final answer
    x = 1,019.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.