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Finding the Fourth Proportional to 2,390.70, 3,302.73 and 1,891.74

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Solution

The fourth proportional to 2,390.70, 3,302.73 and 1,891.74 is: 2,613.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,390.70 : 3,302.73 = 1,891.74 : x
  2. Step 2: Convert to fraction form
    2,390.70/3,302.73 = 1,891.74/x
  3. Step 3: Cross multiply
    2,390.70x = 3,302.73 × 1,891.74
  4. Step 4: Simplify right side
    2,390.70x = 6,247,906.45
  5. Step 5: Solve for x
    x = 6,247,906.45/2,390.70
  6. Step 6: Final answer
    x = 2,613.42

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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.