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Finding the Fourth Proportional to 3,411.79, 4,707.72 and 1,919.77

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Solution

The fourth proportional to 3,411.79, 4,707.72 and 1,919.77 is: 2,648.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,411.79 : 4,707.72 = 1,919.77 : x
  2. Step 2: Convert to fraction form
    3,411.79/4,707.72 = 1,919.77/x
  3. Step 3: Cross multiply
    3,411.79x = 4,707.72 × 1,919.77
  4. Step 4: Simplify right side
    3,411.79x = 9,037,727.86
  5. Step 5: Solve for x
    x = 9,037,727.86/3,411.79
  6. Step 6: Final answer
    x = 2,648.97

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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.