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Finding the Fourth Proportional to 1,289.60, 1,937.28 and 1,241

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Solution

The fourth proportional to 1,289.60, 1,937.28 and 1,241 is: 1,864.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.60 : 1,937.28 = 1,241 : x
  2. Step 2: Convert to fraction form
    1,289.60/1,937.28 = 1,241/x
  3. Step 3: Cross multiply
    1,289.60x = 1,937.28 × 1,241
  4. Step 4: Simplify right side
    1,289.60x = 2,404,164.48
  5. Step 5: Solve for x
    x = 2,404,164.48/1,289.60
  6. Step 6: Final answer
    x = 1,864.27

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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.