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Finding the Fourth Proportional to 3,479.42, 4,802 and 1,987.55

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Solution

The fourth proportional to 3,479.42, 4,802 and 1,987.55 is: 2,743.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,479.42 : 4,802 = 1,987.55 : x
  2. Step 2: Convert to fraction form
    3,479.42/4,802 = 1,987.55/x
  3. Step 3: Cross multiply
    3,479.42x = 4,802 × 1,987.55
  4. Step 4: Simplify right side
    3,479.42x = 9,544,215.10
  5. Step 5: Solve for x
    x = 9,544,215.10/3,479.42
  6. Step 6: Final answer
    x = 2,743.05

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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.