Home / 3,218.90-4,829.56-1,272.47

Finding the Fourth Proportional to 3,218.90, 4,829.56 and 1,272.47

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Solution

The fourth proportional to 3,218.90, 4,829.56 and 1,272.47 is: 1,909.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.90 : 4,829.56 = 1,272.47 : x
  2. Step 2: Convert to fraction form
    3,218.90/4,829.56 = 1,272.47/x
  3. Step 3: Cross multiply
    3,218.90x = 4,829.56 × 1,272.47
  4. Step 4: Simplify right side
    3,218.90x = 6,145,442.88
  5. Step 5: Solve for x
    x = 6,145,442.88/3,218.90
  6. Step 6: Final answer
    x = 1,909.18

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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.