Home / 2,883.52-3,979-1,688.65

Finding the Fourth Proportional to 2,883.52, 3,979 and 1,688.65

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Solution

The fourth proportional to 2,883.52, 3,979 and 1,688.65 is: 2,330.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,883.52 : 3,979 = 1,688.65 : x
  2. Step 2: Convert to fraction form
    2,883.52/3,979 = 1,688.65/x
  3. Step 3: Cross multiply
    2,883.52x = 3,979 × 1,688.65
  4. Step 4: Simplify right side
    2,883.52x = 6,719,138.35
  5. Step 5: Solve for x
    x = 6,719,138.35/2,883.52
  6. Step 6: Final answer
    x = 2,330.19

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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.