Home / 2,490.08-3,436.16-1,386.08

Finding the Fourth Proportional to 2,490.08, 3,436.16 and 1,386.08

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Solution

The fourth proportional to 2,490.08, 3,436.16 and 1,386.08 is: 1,912.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,490.08 : 3,436.16 = 1,386.08 : x
  2. Step 2: Convert to fraction form
    2,490.08/3,436.16 = 1,386.08/x
  3. Step 3: Cross multiply
    2,490.08x = 3,436.16 × 1,386.08
  4. Step 4: Simplify right side
    2,490.08x = 4,762,792.65
  5. Step 5: Solve for x
    x = 4,762,792.65/2,490.08
  6. Step 6: Final answer
    x = 1,912.71

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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.