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Finding the Fourth Proportional to 1,293.10, 1,939.75 and 368.75

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Solution

The fourth proportional to 1,293.10, 1,939.75 and 368.75 is: 553.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.10 : 1,939.75 = 368.75 : x
  2. Step 2: Convert to fraction form
    1,293.10/1,939.75 = 368.75/x
  3. Step 3: Cross multiply
    1,293.10x = 1,939.75 × 368.75
  4. Step 4: Simplify right side
    1,293.10x = 715,286.74
  5. Step 5: Solve for x
    x = 715,286.74/1,293.10
  6. Step 6: Final answer
    x = 553.16

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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.