Home / 3,428.47-5,142.71-1,237.20

Finding the Fourth Proportional to 3,428.47, 5,142.71 and 1,237.20

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Solution

The fourth proportional to 3,428.47, 5,142.71 and 1,237.20 is: 1,855.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.47 : 5,142.71 = 1,237.20 : x
  2. Step 2: Convert to fraction form
    3,428.47/5,142.71 = 1,237.20/x
  3. Step 3: Cross multiply
    3,428.47x = 5,142.71 × 1,237.20
  4. Step 4: Simplify right side
    3,428.47x = 6,362,528.91
  5. Step 5: Solve for x
    x = 6,362,528.91/3,428.47
  6. Step 6: Final answer
    x = 1,855.79

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Double scale
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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.