Home / 1,640.20-2,261.46-1,018.12

Finding the Fourth Proportional to 1,640.20, 2,261.46 and 1,018.12

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Solution

The fourth proportional to 1,640.20, 2,261.46 and 1,018.12 is: 1,403.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.20 : 2,261.46 = 1,018.12 : x
  2. Step 2: Convert to fraction form
    1,640.20/2,261.46 = 1,018.12/x
  3. Step 3: Cross multiply
    1,640.20x = 2,261.46 × 1,018.12
  4. Step 4: Simplify right side
    1,640.20x = 2,302,437.66
  5. Step 5: Solve for x
    x = 2,302,437.66/1,640.20
  6. Step 6: Final answer
    x = 1,403.75

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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.