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Finding the Fourth Proportional to 1,646.46, 2,468.07 and 781.38

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Solution

The fourth proportional to 1,646.46, 2,468.07 and 781.38 is: 1,171.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,646.46 : 2,468.07 = 781.38 : x
  2. Step 2: Convert to fraction form
    1,646.46/2,468.07 = 781.38/x
  3. Step 3: Cross multiply
    1,646.46x = 2,468.07 × 781.38
  4. Step 4: Simplify right side
    1,646.46x = 1,928,500.54
  5. Step 5: Solve for x
    x = 1,928,500.54/1,646.46
  6. Step 6: Final answer
    x = 1,171.30

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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.