Home / 2,985.74-4,121.79-1,867.30

Finding the Fourth Proportional to 2,985.74, 4,121.79 and 1,867.30

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Solution

The fourth proportional to 2,985.74, 4,121.79 and 1,867.30 is: 2,577.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.74 : 4,121.79 = 1,867.30 : x
  2. Step 2: Convert to fraction form
    2,985.74/4,121.79 = 1,867.30/x
  3. Step 3: Cross multiply
    2,985.74x = 4,121.79 × 1,867.30
  4. Step 4: Simplify right side
    2,985.74x = 7,696,624.35
  5. Step 5: Solve for x
    x = 7,696,624.35/2,985.74
  6. Step 6: Final answer
    x = 2,577.80

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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.