Home / 4,209.85-6,315.02-1,288.18

Finding the Fourth Proportional to 4,209.85, 6,315.02 and 1,288.18

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Solution

The fourth proportional to 4,209.85, 6,315.02 and 1,288.18 is: 1,932.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,209.85 : 6,315.02 = 1,288.18 : x
  2. Step 2: Convert to fraction form
    4,209.85/6,315.02 = 1,288.18/x
  3. Step 3: Cross multiply
    4,209.85x = 6,315.02 × 1,288.18
  4. Step 4: Simplify right side
    4,209.85x = 8,134,869.90
  5. Step 5: Solve for x
    x = 8,134,869.90/4,209.85
  6. Step 6: Final answer
    x = 1,932.34

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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.