Home / 2,490.27-3,436.62-1,428.36

Finding the Fourth Proportional to 2,490.27, 3,436.62 and 1,428.36

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Solution

The fourth proportional to 2,490.27, 3,436.62 and 1,428.36 is: 1,971.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,490.27 : 3,436.62 = 1,428.36 : x
  2. Step 2: Convert to fraction form
    2,490.27/3,436.62 = 1,428.36/x
  3. Step 3: Cross multiply
    2,490.27x = 3,436.62 × 1,428.36
  4. Step 4: Simplify right side
    2,490.27x = 4,908,730.54
  5. Step 5: Solve for x
    x = 4,908,730.54/2,490.27
  6. Step 6: Final answer
    x = 1,971.16

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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.