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Finding the Fourth Proportional to 2,628.61, 3,943.15 and 754.51

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Solution

The fourth proportional to 2,628.61, 3,943.15 and 754.51 is: 1,131.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,628.61 : 3,943.15 = 754.51 : x
  2. Step 2: Convert to fraction form
    2,628.61/3,943.15 = 754.51/x
  3. Step 3: Cross multiply
    2,628.61x = 3,943.15 × 754.51
  4. Step 4: Simplify right side
    2,628.61x = 2,975,146.11
  5. Step 5: Solve for x
    x = 2,975,146.11/2,628.61
  6. Step 6: Final answer
    x = 1,131.83

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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.