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Finding the Fourth Proportional to 3,890.51, 5,369.51 and 2,319.51

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Solution

The fourth proportional to 3,890.51, 5,369.51 and 2,319.51 is: 3,201.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.51 : 5,369.51 = 2,319.51 : x
  2. Step 2: Convert to fraction form
    3,890.51/5,369.51 = 2,319.51/x
  3. Step 3: Cross multiply
    3,890.51x = 5,369.51 × 2,319.51
  4. Step 4: Simplify right side
    3,890.51x = 12,454,637.94
  5. Step 5: Solve for x
    x = 12,454,637.94/3,890.51
  6. Step 6: Final answer
    x = 3,201.29

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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.