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Finding the Fourth Proportional to 2,454.76, 3,681.80 and 811.12

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Solution

The fourth proportional to 2,454.76, 3,681.80 and 811.12 is: 1,216.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,454.76 : 3,681.80 = 811.12 : x
  2. Step 2: Convert to fraction form
    2,454.76/3,681.80 = 811.12/x
  3. Step 3: Cross multiply
    2,454.76x = 3,681.80 × 811.12
  4. Step 4: Simplify right side
    2,454.76x = 2,986,381.62
  5. Step 5: Solve for x
    x = 2,986,381.62/2,454.76
  6. Step 6: Final answer
    x = 1,216.57

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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.