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Finding the Fourth Proportional to 3,411.54, 5,117.31 and 1,220.22

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Solution

The fourth proportional to 3,411.54, 5,117.31 and 1,220.22 is: 1,830.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,411.54 : 5,117.31 = 1,220.22 : x
  2. Step 2: Convert to fraction form
    3,411.54/5,117.31 = 1,220.22/x
  3. Step 3: Cross multiply
    3,411.54x = 5,117.31 × 1,220.22
  4. Step 4: Simplify right side
    3,411.54x = 6,244,244.01
  5. Step 5: Solve for x
    x = 6,244,244.01/3,411.54
  6. Step 6: Final answer
    x = 1,830.33

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Half scale
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Double scale
Find fourth proportional to 3,412.54, 5,118.81 and 1,221.22
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.