Home / 2,121.61-2,927.82-1,177.40

Finding the Fourth Proportional to 2,121.61, 2,927.82 and 1,177.40

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Solution

The fourth proportional to 2,121.61, 2,927.82 and 1,177.40 is: 1,624.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.61 : 2,927.82 = 1,177.40 : x
  2. Step 2: Convert to fraction form
    2,121.61/2,927.82 = 1,177.40/x
  3. Step 3: Cross multiply
    2,121.61x = 2,927.82 × 1,177.40
  4. Step 4: Simplify right side
    2,121.61x = 3,447,227.55
  5. Step 5: Solve for x
    x = 3,447,227.55/2,121.61
  6. Step 6: Final answer
    x = 1,624.82

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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.