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Finding the Fourth Proportional to 2,634.93, 3,952.40 and 687.12

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Solution

The fourth proportional to 2,634.93, 3,952.40 and 687.12 is: 1,030.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,634.93 : 3,952.40 = 687.12 : x
  2. Step 2: Convert to fraction form
    2,634.93/3,952.40 = 687.12/x
  3. Step 3: Cross multiply
    2,634.93x = 3,952.40 × 687.12
  4. Step 4: Simplify right side
    2,634.93x = 2,715,754.83
  5. Step 5: Solve for x
    x = 2,715,754.83/2,634.93
  6. Step 6: Final answer
    x = 1,030.67

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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.