Home / 1,988.55-2,977.36-1,012.70

Finding the Fourth Proportional to 1,988.55, 2,977.36 and 1,012.70

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Solution

The fourth proportional to 1,988.55, 2,977.36 and 1,012.70 is: 1,516.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.55 : 2,977.36 = 1,012.70 : x
  2. Step 2: Convert to fraction form
    1,988.55/2,977.36 = 1,012.70/x
  3. Step 3: Cross multiply
    1,988.55x = 2,977.36 × 1,012.70
  4. Step 4: Simplify right side
    1,988.55x = 3,015,177.38
  5. Step 5: Solve for x
    x = 3,015,177.38/1,988.55
  6. Step 6: Final answer
    x = 1,516.27

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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.