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Finding the Fourth Proportional to 1,328.52, 1,982.74 and 1,293.96

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Solution

The fourth proportional to 1,328.52, 1,982.74 and 1,293.96 is: 1,931.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.52 : 1,982.74 = 1,293.96 : x
  2. Step 2: Convert to fraction form
    1,328.52/1,982.74 = 1,293.96/x
  3. Step 3: Cross multiply
    1,328.52x = 1,982.74 × 1,293.96
  4. Step 4: Simplify right side
    1,328.52x = 2,565,579.78
  5. Step 5: Solve for x
    x = 2,565,579.78/1,328.52
  6. Step 6: Final answer
    x = 1,931.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.