Home / 5,185.48-7,778.22-1,289.89

Finding the Fourth Proportional to 5,185.48, 7,778.22 and 1,289.89

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Solution

The fourth proportional to 5,185.48, 7,778.22 and 1,289.89 is: 1,934.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,185.48 : 7,778.22 = 1,289.89 : x
  2. Step 2: Convert to fraction form
    5,185.48/7,778.22 = 1,289.89/x
  3. Step 3: Cross multiply
    5,185.48x = 7,778.22 × 1,289.89
  4. Step 4: Simplify right side
    5,185.48x = 10,033,048.20
  5. Step 5: Solve for x
    x = 10,033,048.20/5,185.48
  6. Step 6: Final answer
    x = 1,934.84

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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.