Home / 2,612.40-3,918.68-1,313.16

Finding the Fourth Proportional to 2,612.40, 3,918.68 and 1,313.16

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Solution

The fourth proportional to 2,612.40, 3,918.68 and 1,313.16 is: 1,969.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,612.40 : 3,918.68 = 1,313.16 : x
  2. Step 2: Convert to fraction form
    2,612.40/3,918.68 = 1,313.16/x
  3. Step 3: Cross multiply
    2,612.40x = 3,918.68 × 1,313.16
  4. Step 4: Simplify right side
    2,612.40x = 5,145,853.83
  5. Step 5: Solve for x
    x = 5,145,853.83/2,612.40
  6. Step 6: Final answer
    x = 1,969.78

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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.