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Finding the Fourth Proportional to 3,855.64, 5,320.74 and 2,283.76

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Solution

The fourth proportional to 3,855.64, 5,320.74 and 2,283.76 is: 3,151.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.64 : 5,320.74 = 2,283.76 : x
  2. Step 2: Convert to fraction form
    3,855.64/5,320.74 = 2,283.76/x
  3. Step 3: Cross multiply
    3,855.64x = 5,320.74 × 2,283.76
  4. Step 4: Simplify right side
    3,855.64x = 12,151,293.18
  5. Step 5: Solve for x
    x = 12,151,293.18/3,855.64
  6. Step 6: Final answer
    x = 3,151.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.