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Finding the Fourth Proportional to 3,876.99, 5,815.41 and 1,103.68

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Solution

The fourth proportional to 3,876.99, 5,815.41 and 1,103.68 is: 1,655.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.99 : 5,815.41 = 1,103.68 : x
  2. Step 2: Convert to fraction form
    3,876.99/5,815.41 = 1,103.68/x
  3. Step 3: Cross multiply
    3,876.99x = 5,815.41 × 1,103.68
  4. Step 4: Simplify right side
    3,876.99x = 6,418,351.71
  5. Step 5: Solve for x
    x = 6,418,351.71/3,876.99
  6. Step 6: Final answer
    x = 1,655.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 3,877.99, 5,816.91 and 1,104.68
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.