Home / 2,380.82-3,285.74-1,386.19

Finding the Fourth Proportional to 2,380.82, 3,285.74 and 1,386.19

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Solution

The fourth proportional to 2,380.82, 3,285.74 and 1,386.19 is: 1,913.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,380.82 : 3,285.74 = 1,386.19 : x
  2. Step 2: Convert to fraction form
    2,380.82/3,285.74 = 1,386.19/x
  3. Step 3: Cross multiply
    2,380.82x = 3,285.74 × 1,386.19
  4. Step 4: Simplify right side
    2,380.82x = 4,554,644.79
  5. Step 5: Solve for x
    x = 4,554,644.79/2,380.82
  6. Step 6: Final answer
    x = 1,913.06

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Half scale
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Double scale
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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.