Home / 4,209.48-6,314.30-1,287.78

Finding the Fourth Proportional to 4,209.48, 6,314.30 and 1,287.78

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Solution

The fourth proportional to 4,209.48, 6,314.30 and 1,287.78 is: 1,931.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,209.48 : 6,314.30 = 1,287.78 : x
  2. Step 2: Convert to fraction form
    4,209.48/6,314.30 = 1,287.78/x
  3. Step 3: Cross multiply
    4,209.48x = 6,314.30 × 1,287.78
  4. Step 4: Simplify right side
    4,209.48x = 8,131,422.82
  5. Step 5: Solve for x
    x = 8,131,422.82/4,209.48
  6. Step 6: Final answer
    x = 1,931.69

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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.