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Finding the Fourth Proportional to 1,291.01, 1,936.31 and 560.39

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Solution

The fourth proportional to 1,291.01, 1,936.31 and 560.39 is: 840.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.01 : 1,936.31 = 560.39 : x
  2. Step 2: Convert to fraction form
    1,291.01/1,936.31 = 560.39/x
  3. Step 3: Cross multiply
    1,291.01x = 1,936.31 × 560.39
  4. Step 4: Simplify right side
    1,291.01x = 1,085,076.28
  5. Step 5: Solve for x
    x = 1,085,076.28/1,291.01
  6. Step 6: Final answer
    x = 840.49

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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.