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Finding the Fourth Proportional to 2,809.95, 3,877.69 and 1,551.05

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Solution

The fourth proportional to 2,809.95, 3,877.69 and 1,551.05 is: 2,140.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,809.95 : 3,877.69 = 1,551.05 : x
  2. Step 2: Convert to fraction form
    2,809.95/3,877.69 = 1,551.05/x
  3. Step 3: Cross multiply
    2,809.95x = 3,877.69 × 1,551.05
  4. Step 4: Simplify right side
    2,809.95x = 6,014,478.71
  5. Step 5: Solve for x
    x = 6,014,478.71/2,809.95
  6. Step 6: Final answer
    x = 2,140.42

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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.