Home / 3,311.87-4,570.39-1,985.57

Finding the Fourth Proportional to 3,311.87, 4,570.39 and 1,985.57

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Solution

The fourth proportional to 3,311.87, 4,570.39 and 1,985.57 is: 2,740.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,311.87 : 4,570.39 = 1,985.57 : x
  2. Step 2: Convert to fraction form
    3,311.87/4,570.39 = 1,985.57/x
  3. Step 3: Cross multiply
    3,311.87x = 4,570.39 × 1,985.57
  4. Step 4: Simplify right side
    3,311.87x = 9,074,801.46
  5. Step 5: Solve for x
    x = 9,074,801.46/3,311.87
  6. Step 6: Final answer
    x = 2,740.09

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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.