Home / 1,988.74-2,981.35-1,015.39

Finding the Fourth Proportional to 1,988.74, 2,981.35 and 1,015.39

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Solution

The fourth proportional to 1,988.74, 2,981.35 and 1,015.39 is: 1,522.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.74 : 2,981.35 = 1,015.39 : x
  2. Step 2: Convert to fraction form
    1,988.74/2,981.35 = 1,015.39/x
  3. Step 3: Cross multiply
    1,988.74x = 2,981.35 × 1,015.39
  4. Step 4: Simplify right side
    1,988.74x = 3,027,232.98
  5. Step 5: Solve for x
    x = 3,027,232.98/1,988.74
  6. Step 6: Final answer
    x = 1,522.19

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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.