Home / 3,518.90-5,278.52-921.84

Finding the Fourth Proportional to 3,518.90, 5,278.52 and 921.84

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Solution

The fourth proportional to 3,518.90, 5,278.52 and 921.84 is: 1,382.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,518.90 : 5,278.52 = 921.84 : x
  2. Step 2: Convert to fraction form
    3,518.90/5,278.52 = 921.84/x
  3. Step 3: Cross multiply
    3,518.90x = 5,278.52 × 921.84
  4. Step 4: Simplify right side
    3,518.90x = 4,865,950.88
  5. Step 5: Solve for x
    x = 4,865,950.88/3,518.90
  6. Step 6: Final answer
    x = 1,382.80

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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.