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Finding the Fourth Proportional to 1,801.59, 2,486.21 and 1,138.74

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Solution

The fourth proportional to 1,801.59, 2,486.21 and 1,138.74 is: 1,571.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,801.59 : 2,486.21 = 1,138.74 : x
  2. Step 2: Convert to fraction form
    1,801.59/2,486.21 = 1,138.74/x
  3. Step 3: Cross multiply
    1,801.59x = 2,486.21 × 1,138.74
  4. Step 4: Simplify right side
    1,801.59x = 2,831,146.78
  5. Step 5: Solve for x
    x = 2,831,146.78/1,801.59
  6. Step 6: Final answer
    x = 1,571.47

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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.