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Finding the Fourth Proportional to 3,155.55, 4,728.10 and 1,919.22

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Solution

The fourth proportional to 3,155.55, 4,728.10 and 1,919.22 is: 2,875.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,155.55 : 4,728.10 = 1,919.22 : x
  2. Step 2: Convert to fraction form
    3,155.55/4,728.10 = 1,919.22/x
  3. Step 3: Cross multiply
    3,155.55x = 4,728.10 × 1,919.22
  4. Step 4: Simplify right side
    3,155.55x = 9,074,277.01
  5. Step 5: Solve for x
    x = 9,074,277.01/3,155.55
  6. Step 6: Final answer
    x = 2,875.65

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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.