Home / 4,425.28-6,638.15-1,138.40

Finding the Fourth Proportional to 4,425.28, 6,638.15 and 1,138.40

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Solution

The fourth proportional to 4,425.28, 6,638.15 and 1,138.40 is: 1,707.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,425.28 : 6,638.15 = 1,138.40 : x
  2. Step 2: Convert to fraction form
    4,425.28/6,638.15 = 1,138.40/x
  3. Step 3: Cross multiply
    4,425.28x = 6,638.15 × 1,138.40
  4. Step 4: Simplify right side
    4,425.28x = 7,556,889.40
  5. Step 5: Solve for x
    x = 7,556,889.40/4,425.28
  6. Step 6: Final answer
    x = 1,707.66

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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.