Home / 4,209.70-6,314.55-1,288.90

Finding the Fourth Proportional to 4,209.70, 6,314.55 and 1,288.90

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Solution

The fourth proportional to 4,209.70, 6,314.55 and 1,288.90 is: 1,933.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,209.70 : 6,314.55 = 1,288.90 : x
  2. Step 2: Convert to fraction form
    4,209.70/6,314.55 = 1,288.90/x
  3. Step 3: Cross multiply
    4,209.70x = 6,314.55 × 1,288.90
  4. Step 4: Simplify right side
    4,209.70x = 8,138,823.50
  5. Step 5: Solve for x
    x = 8,138,823.50/4,209.70
  6. Step 6: Final answer
    x = 1,933.35

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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.