Home / 3,421.60-5,128.14-1,777.18

Finding the Fourth Proportional to 3,421.60, 5,128.14 and 1,777.18

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Solution

The fourth proportional to 3,421.60, 5,128.14 and 1,777.18 is: 2,663.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.60 : 5,128.14 = 1,777.18 : x
  2. Step 2: Convert to fraction form
    3,421.60/5,128.14 = 1,777.18/x
  3. Step 3: Cross multiply
    3,421.60x = 5,128.14 × 1,777.18
  4. Step 4: Simplify right side
    3,421.60x = 9,113,627.85
  5. Step 5: Solve for x
    x = 9,113,627.85/3,421.60
  6. Step 6: Final answer
    x = 2,663.56

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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.