Home / 3,431.64-5,146.10-1,239.18

Finding the Fourth Proportional to 3,431.64, 5,146.10 and 1,239.18

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Solution

The fourth proportional to 3,431.64, 5,146.10 and 1,239.18 is: 1,858.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.64 : 5,146.10 = 1,239.18 : x
  2. Step 2: Convert to fraction form
    3,431.64/5,146.10 = 1,239.18/x
  3. Step 3: Cross multiply
    3,431.64x = 5,146.10 × 1,239.18
  4. Step 4: Simplify right side
    3,431.64x = 6,376,944.20
  5. Step 5: Solve for x
    x = 6,376,944.20/3,431.64
  6. Step 6: Final answer
    x = 1,858.28

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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.