Home / 1,286.45-1,931.58-1,052.90

Finding the Fourth Proportional to 1,286.45, 1,931.58 and 1,052.90

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Solution

The fourth proportional to 1,286.45, 1,931.58 and 1,052.90 is: 1,580.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.45 : 1,931.58 = 1,052.90 : x
  2. Step 2: Convert to fraction form
    1,286.45/1,931.58 = 1,052.90/x
  3. Step 3: Cross multiply
    1,286.45x = 1,931.58 × 1,052.90
  4. Step 4: Simplify right side
    1,286.45x = 2,033,760.58
  5. Step 5: Solve for x
    x = 2,033,760.58/1,286.45
  6. Step 6: Final answer
    x = 1,580.91

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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.