Home / 2,381.12-3,285.87-1,386.38

Finding the Fourth Proportional to 2,381.12, 3,285.87 and 1,386.38

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Solution

The fourth proportional to 2,381.12, 3,285.87 and 1,386.38 is: 1,913.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,381.12 : 3,285.87 = 1,386.38 : x
  2. Step 2: Convert to fraction form
    2,381.12/3,285.87 = 1,386.38/x
  3. Step 3: Cross multiply
    2,381.12x = 3,285.87 × 1,386.38
  4. Step 4: Simplify right side
    2,381.12x = 4,555,448.02
  5. Step 5: Solve for x
    x = 4,555,448.02/2,381.12
  6. Step 6: Final answer
    x = 1,913.16

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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.