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Finding the Fourth Proportional to 2,817.78, 3,888.51 and 1,558.92

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Solution

The fourth proportional to 2,817.78, 3,888.51 and 1,558.92 is: 2,151.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.78 : 3,888.51 = 1,558.92 : x
  2. Step 2: Convert to fraction form
    2,817.78/3,888.51 = 1,558.92/x
  3. Step 3: Cross multiply
    2,817.78x = 3,888.51 × 1,558.92
  4. Step 4: Simplify right side
    2,817.78x = 6,061,876.01
  5. Step 5: Solve for x
    x = 6,061,876.01/2,817.78
  6. Step 6: Final answer
    x = 2,151.29

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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.