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Finding the Fourth Proportional to 2,157.71, 2,979.15 and 1,716.65

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Solution

The fourth proportional to 2,157.71, 2,979.15 and 1,716.65 is: 2,370.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.71 : 2,979.15 = 1,716.65 : x
  2. Step 2: Convert to fraction form
    2,157.71/2,979.15 = 1,716.65/x
  3. Step 3: Cross multiply
    2,157.71x = 2,979.15 × 1,716.65
  4. Step 4: Simplify right side
    2,157.71x = 5,114,157.85
  5. Step 5: Solve for x
    x = 5,114,157.85/2,157.71
  6. Step 6: Final answer
    x = 2,370.18

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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.