Home / 2,117.14-3,174.54-782.38

Finding the Fourth Proportional to 2,117.14, 3,174.54 and 782.38

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Solution

The fourth proportional to 2,117.14, 3,174.54 and 782.38 is: 1,173.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.14 : 3,174.54 = 782.38 : x
  2. Step 2: Convert to fraction form
    2,117.14/3,174.54 = 782.38/x
  3. Step 3: Cross multiply
    2,117.14x = 3,174.54 × 782.38
  4. Step 4: Simplify right side
    2,117.14x = 2,483,684.18
  5. Step 5: Solve for x
    x = 2,483,684.18/2,117.14
  6. Step 6: Final answer
    x = 1,173.13

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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.