Home / 4,619.70-6,930.45-1,987.20

Finding the Fourth Proportional to 4,619.70, 6,930.45 and 1,987.20

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Solution

The fourth proportional to 4,619.70, 6,930.45 and 1,987.20 is: 2,981.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,619.70 : 6,930.45 = 1,987.20 : x
  2. Step 2: Convert to fraction form
    4,619.70/6,930.45 = 1,987.20/x
  3. Step 3: Cross multiply
    4,619.70x = 6,930.45 × 1,987.20
  4. Step 4: Simplify right side
    4,619.70x = 13,772,190.24
  5. Step 5: Solve for x
    x = 13,772,190.24/4,619.70
  6. Step 6: Final answer
    x = 2,981.19

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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.