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Finding the Fourth Proportional to 2,810.61, 3,878.73 and 1,551.65

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Solution

The fourth proportional to 2,810.61, 3,878.73 and 1,551.65 is: 2,141.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,810.61 : 3,878.73 = 1,551.65 : x
  2. Step 2: Convert to fraction form
    2,810.61/3,878.73 = 1,551.65/x
  3. Step 3: Cross multiply
    2,810.61x = 3,878.73 × 1,551.65
  4. Step 4: Simplify right side
    2,810.61x = 6,018,412.01
  5. Step 5: Solve for x
    x = 6,018,412.01/2,810.61
  6. Step 6: Final answer
    x = 2,141.32

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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.