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Finding the Fourth Proportional to 2,854.20, 4,280.84 and 906.87

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Solution

The fourth proportional to 2,854.20, 4,280.84 and 906.87 is: 1,360.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,854.20 : 4,280.84 = 906.87 : x
  2. Step 2: Convert to fraction form
    2,854.20/4,280.84 = 906.87/x
  3. Step 3: Cross multiply
    2,854.20x = 4,280.84 × 906.87
  4. Step 4: Simplify right side
    2,854.20x = 3,882,160.84
  5. Step 5: Solve for x
    x = 3,882,160.84/2,854.20
  6. Step 6: Final answer
    x = 1,360.16

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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.