Home / 1,391.18-2,087.57-514.28

Finding the Fourth Proportional to 1,391.18, 2,087.57 and 514.28

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Solution

The fourth proportional to 1,391.18, 2,087.57 and 514.28 is: 771.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.18 : 2,087.57 = 514.28 : x
  2. Step 2: Convert to fraction form
    1,391.18/2,087.57 = 514.28/x
  3. Step 3: Cross multiply
    1,391.18x = 2,087.57 × 514.28
  4. Step 4: Simplify right side
    1,391.18x = 1,073,602.00
  5. Step 5: Solve for x
    x = 1,073,602.00/1,391.18
  6. Step 6: Final answer
    x = 771.72

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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.