Home / 2,640.18-3,977.85-2,390.16

Finding the Fourth Proportional to 2,640.18, 3,977.85 and 2,390.16

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Solution

The fourth proportional to 2,640.18, 3,977.85 and 2,390.16 is: 3,601.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.18 : 3,977.85 = 2,390.16 : x
  2. Step 2: Convert to fraction form
    2,640.18/3,977.85 = 2,390.16/x
  3. Step 3: Cross multiply
    2,640.18x = 3,977.85 × 2,390.16
  4. Step 4: Simplify right side
    2,640.18x = 9,507,697.96
  5. Step 5: Solve for x
    x = 9,507,697.96/2,640.18
  6. Step 6: Final answer
    x = 3,601.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.