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Finding the Fourth Proportional to 3,393.78, 4,683.36 and 1,901.69

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Solution

The fourth proportional to 3,393.78, 4,683.36 and 1,901.69 is: 2,624.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,393.78 : 4,683.36 = 1,901.69 : x
  2. Step 2: Convert to fraction form
    3,393.78/4,683.36 = 1,901.69/x
  3. Step 3: Cross multiply
    3,393.78x = 4,683.36 × 1,901.69
  4. Step 4: Simplify right side
    3,393.78x = 8,906,298.88
  5. Step 5: Solve for x
    x = 8,906,298.88/3,393.78
  6. Step 6: Final answer
    x = 2,624.30

Related Problems

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Half scale
Find fourth proportional to 6,787.56, 9,366.72 and 3,803.38
Double scale
Find fourth proportional to 3,394.78, 4,684.74 and 1,902.69
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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.