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Finding the Fourth Proportional to 3,920.67, 5,411.07 and 2,429.01

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Solution

The fourth proportional to 3,920.67, 5,411.07 and 2,429.01 is: 3,352.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.67 : 5,411.07 = 2,429.01 : x
  2. Step 2: Convert to fraction form
    3,920.67/5,411.07 = 2,429.01/x
  3. Step 3: Cross multiply
    3,920.67x = 5,411.07 × 2,429.01
  4. Step 4: Simplify right side
    3,920.67x = 13,143,543.14
  5. Step 5: Solve for x
    x = 13,143,543.14/3,920.67
  6. Step 6: Final answer
    x = 3,352.37

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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.