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Finding the Fourth Proportional to 1,377.80, 2,066.46 and 453.34

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Solution

The fourth proportional to 1,377.80, 2,066.46 and 453.34 is: 679.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.80 : 2,066.46 = 453.34 : x
  2. Step 2: Convert to fraction form
    1,377.80/2,066.46 = 453.34/x
  3. Step 3: Cross multiply
    1,377.80x = 2,066.46 × 453.34
  4. Step 4: Simplify right side
    1,377.80x = 936,808.98
  5. Step 5: Solve for x
    x = 936,808.98/1,377.80
  6. Step 6: Final answer
    x = 679.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.