Home / 2,118.45-3,176.67-637.11

Finding the Fourth Proportional to 2,118.45, 3,176.67 and 637.11

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Solution

The fourth proportional to 2,118.45, 3,176.67 and 637.11 is: 955.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.45 : 3,176.67 = 637.11 : x
  2. Step 2: Convert to fraction form
    2,118.45/3,176.67 = 637.11/x
  3. Step 3: Cross multiply
    2,118.45x = 3,176.67 × 637.11
  4. Step 4: Simplify right side
    2,118.45x = 2,023,888.22
  5. Step 5: Solve for x
    x = 2,023,888.22/2,118.45
  6. Step 6: Final answer
    x = 955.36

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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.