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Finding the Fourth Proportional to 1,140.94, 1,711.41 and 275.25

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Solution

The fourth proportional to 1,140.94, 1,711.41 and 275.25 is: 412.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.94 : 1,711.41 = 275.25 : x
  2. Step 2: Convert to fraction form
    1,140.94/1,711.41 = 275.25/x
  3. Step 3: Cross multiply
    1,140.94x = 1,711.41 × 275.25
  4. Step 4: Simplify right side
    1,140.94x = 471,065.60
  5. Step 5: Solve for x
    x = 471,065.60/1,140.94
  6. Step 6: Final answer
    x = 412.88

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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.