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Finding the Fourth Proportional to 2,855.79, 4,286.11 and 1,125.63

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Solution

The fourth proportional to 2,855.79, 4,286.11 and 1,125.63 is: 1,689.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.79 : 4,286.11 = 1,125.63 : x
  2. Step 2: Convert to fraction form
    2,855.79/4,286.11 = 1,125.63/x
  3. Step 3: Cross multiply
    2,855.79x = 4,286.11 × 1,125.63
  4. Step 4: Simplify right side
    2,855.79x = 4,824,574.00
  5. Step 5: Solve for x
    x = 4,824,574.00/2,855.79
  6. Step 6: Final answer
    x = 1,689.40

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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.