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Finding the Fourth Proportional to 1,612.71, 2,419.41 and 919.71

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Solution

The fourth proportional to 1,612.71, 2,419.41 and 919.71 is: 1,379.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,612.71 : 2,419.41 = 919.71 : x
  2. Step 2: Convert to fraction form
    1,612.71/2,419.41 = 919.71/x
  3. Step 3: Cross multiply
    1,612.71x = 2,419.41 × 919.71
  4. Step 4: Simplify right side
    1,612.71x = 2,225,155.57
  5. Step 5: Solve for x
    x = 2,225,155.57/1,612.71
  6. Step 6: Final answer
    x = 1,379.76

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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.