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Finding the Fourth Proportional to 1,764.80, 2,645.84 and 874.79

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Solution

The fourth proportional to 1,764.80, 2,645.84 and 874.79 is: 1,311.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,764.80 : 2,645.84 = 874.79 : x
  2. Step 2: Convert to fraction form
    1,764.80/2,645.84 = 874.79/x
  3. Step 3: Cross multiply
    1,764.80x = 2,645.84 × 874.79
  4. Step 4: Simplify right side
    1,764.80x = 2,314,554.37
  5. Step 5: Solve for x
    x = 2,314,554.37/1,764.80
  6. Step 6: Final answer
    x = 1,311.51

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1.5x scale

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.