Home / 3,970.61-5,479.59-2,177.98

Finding the Fourth Proportional to 3,970.61, 5,479.59 and 2,177.98

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Solution

The fourth proportional to 3,970.61, 5,479.59 and 2,177.98 is: 3,005.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.61 : 5,479.59 = 2,177.98 : x
  2. Step 2: Convert to fraction form
    3,970.61/5,479.59 = 2,177.98/x
  3. Step 3: Cross multiply
    3,970.61x = 5,479.59 × 2,177.98
  4. Step 4: Simplify right side
    3,970.61x = 11,934,452.45
  5. Step 5: Solve for x
    x = 11,934,452.45/3,970.61
  6. Step 6: Final answer
    x = 3,005.70

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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.