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Finding the Fourth Proportional to 2,926.80, 4,388.92 and 874.32

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Solution

The fourth proportional to 2,926.80, 4,388.92 and 874.32 is: 1,311.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,926.80 : 4,388.92 = 874.32 : x
  2. Step 2: Convert to fraction form
    2,926.80/4,388.92 = 874.32/x
  3. Step 3: Cross multiply
    2,926.80x = 4,388.92 × 874.32
  4. Step 4: Simplify right side
    2,926.80x = 3,837,320.53
  5. Step 5: Solve for x
    x = 3,837,320.53/2,926.80
  6. Step 6: Final answer
    x = 1,311.10

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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.