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Finding the Fourth Proportional to 3,479.70, 4,802.03 and 1,987.82

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Solution

The fourth proportional to 3,479.70, 4,802.03 and 1,987.82 is: 2,743.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,479.70 : 4,802.03 = 1,987.82 : x
  2. Step 2: Convert to fraction form
    3,479.70/4,802.03 = 1,987.82/x
  3. Step 3: Cross multiply
    3,479.70x = 4,802.03 × 1,987.82
  4. Step 4: Simplify right side
    3,479.70x = 9,545,537.33
  5. Step 5: Solve for x
    x = 9,545,537.33/3,479.70
  6. Step 6: Final answer
    x = 2,743.21

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1.5x scale

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.