Home / 1,988.28-2,977.08-1,292.88

Finding the Fourth Proportional to 1,988.28, 2,977.08 and 1,292.88

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Solution

The fourth proportional to 1,988.28, 2,977.08 and 1,292.88 is: 1,935.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.28 : 2,977.08 = 1,292.88 : x
  2. Step 2: Convert to fraction form
    1,988.28/2,977.08 = 1,292.88/x
  3. Step 3: Cross multiply
    1,988.28x = 2,977.08 × 1,292.88
  4. Step 4: Simplify right side
    1,988.28x = 3,849,007.19
  5. Step 5: Solve for x
    x = 3,849,007.19/1,988.28
  6. Step 6: Final answer
    x = 1,935.85

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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.