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Finding the Fourth Proportional to 3,870.79, 5,808.81 and 2,551.70

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Solution

The fourth proportional to 3,870.79, 5,808.81 and 2,551.70 is: 3,829.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,870.79 : 5,808.81 = 2,551.70 : x
  2. Step 2: Convert to fraction form
    3,870.79/5,808.81 = 2,551.70/x
  3. Step 3: Cross multiply
    3,870.79x = 5,808.81 × 2,551.70
  4. Step 4: Simplify right side
    3,870.79x = 14,822,364.57
  5. Step 5: Solve for x
    x = 14,822,364.57/3,870.79
  6. Step 6: Final answer
    x = 3,829.29

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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.