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Finding the Fourth Proportional to 2,810.76, 3,878.55 and 1,551.75

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Solution

The fourth proportional to 2,810.76, 3,878.55 and 1,551.75 is: 2,141.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,810.76 : 3,878.55 = 1,551.75 : x
  2. Step 2: Convert to fraction form
    2,810.76/3,878.55 = 1,551.75/x
  3. Step 3: Cross multiply
    2,810.76x = 3,878.55 × 1,551.75
  4. Step 4: Simplify right side
    2,810.76x = 6,018,525.42
  5. Step 5: Solve for x
    x = 6,018,525.42/2,810.76
  6. Step 6: Final answer
    x = 2,141.25

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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.