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Finding the Fourth Proportional to 2,810.57, 3,878.56 and 1,551.70

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Solution

The fourth proportional to 2,810.57, 3,878.56 and 1,551.70 is: 2,141.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,810.57 : 3,878.56 = 1,551.70 : x
  2. Step 2: Convert to fraction form
    2,810.57/3,878.56 = 1,551.70/x
  3. Step 3: Cross multiply
    2,810.57x = 3,878.56 × 1,551.70
  4. Step 4: Simplify right side
    2,810.57x = 6,018,368.34
  5. Step 5: Solve for x
    x = 6,018,368.34/2,810.57
  6. Step 6: Final answer
    x = 2,141.34

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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.