Home / 2,156.40-2,975.75-1,318.52

Finding the Fourth Proportional to 2,156.40, 2,975.75 and 1,318.52

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Solution

The fourth proportional to 2,156.40, 2,975.75 and 1,318.52 is: 1,819.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.40 : 2,975.75 = 1,318.52 : x
  2. Step 2: Convert to fraction form
    2,156.40/2,975.75 = 1,318.52/x
  3. Step 3: Cross multiply
    2,156.40x = 2,975.75 × 1,318.52
  4. Step 4: Simplify right side
    2,156.40x = 3,923,564.42
  5. Step 5: Solve for x
    x = 3,923,564.42/2,156.40
  6. Step 6: Final answer
    x = 1,819.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.