Home / 3,314.78-4,574.28-1,987.70

Finding the Fourth Proportional to 3,314.78, 4,574.28 and 1,987.70

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Solution

The fourth proportional to 3,314.78, 4,574.28 and 1,987.70 is: 2,742.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,314.78 : 4,574.28 = 1,987.70 : x
  2. Step 2: Convert to fraction form
    3,314.78/4,574.28 = 1,987.70/x
  3. Step 3: Cross multiply
    3,314.78x = 4,574.28 × 1,987.70
  4. Step 4: Simplify right side
    3,314.78x = 9,092,296.36
  5. Step 5: Solve for x
    x = 9,092,296.36/3,314.78
  6. Step 6: Final answer
    x = 2,742.96

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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.