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Finding the Fourth Proportional to 1,767.68, 2,650.65 and 727.50

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Solution

The fourth proportional to 1,767.68, 2,650.65 and 727.50 is: 1,090.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,767.68 : 2,650.65 = 727.50 : x
  2. Step 2: Convert to fraction form
    1,767.68/2,650.65 = 727.50/x
  3. Step 3: Cross multiply
    1,767.68x = 2,650.65 × 727.50
  4. Step 4: Simplify right side
    1,767.68x = 1,928,347.88
  5. Step 5: Solve for x
    x = 1,928,347.88/1,767.68
  6. Step 6: Final answer
    x = 1,090.90

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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.