Home / 4,209.88-6,314.40-1,288.20

Finding the Fourth Proportional to 4,209.88, 6,314.40 and 1,288.20

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Solution

The fourth proportional to 4,209.88, 6,314.40 and 1,288.20 is: 1,932.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,209.88 : 6,314.40 = 1,288.20 : x
  2. Step 2: Convert to fraction form
    4,209.88/6,314.40 = 1,288.20/x
  3. Step 3: Cross multiply
    4,209.88x = 6,314.40 × 1,288.20
  4. Step 4: Simplify right side
    4,209.88x = 8,134,210.08
  5. Step 5: Solve for x
    x = 8,134,210.08/4,209.88
  6. Step 6: Final answer
    x = 1,932.17

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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.