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Finding the Fourth Proportional to 3,412.01, 4,707.77 and 1,919.79

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Solution

The fourth proportional to 3,412.01, 4,707.77 and 1,919.79 is: 2,648.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,412.01 : 4,707.77 = 1,919.79 : x
  2. Step 2: Convert to fraction form
    3,412.01/4,707.77 = 1,919.79/x
  3. Step 3: Cross multiply
    3,412.01x = 4,707.77 × 1,919.79
  4. Step 4: Simplify right side
    3,412.01x = 9,037,920.17
  5. Step 5: Solve for x
    x = 9,037,920.17/3,412.01
  6. Step 6: Final answer
    x = 2,648.86

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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.