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Finding the Fourth Proportional to 2,817.56, 3,888.06 and 1,558.76

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Solution

The fourth proportional to 2,817.56, 3,888.06 and 1,558.76 is: 2,150.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.56 : 3,888.06 = 1,558.76 : x
  2. Step 2: Convert to fraction form
    2,817.56/3,888.06 = 1,558.76/x
  3. Step 3: Cross multiply
    2,817.56x = 3,888.06 × 1,558.76
  4. Step 4: Simplify right side
    2,817.56x = 6,060,552.41
  5. Step 5: Solve for x
    x = 6,060,552.41/2,817.56
  6. Step 6: Final answer
    x = 2,150.99

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Half scale
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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.