Home / 1,087.30-1,629.72-539.86

Finding the Fourth Proportional to 1,087.30, 1,629.72 and 539.86

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Solution

The fourth proportional to 1,087.30, 1,629.72 and 539.86 is: 809.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.30 : 1,629.72 = 539.86 : x
  2. Step 2: Convert to fraction form
    1,087.30/1,629.72 = 539.86/x
  3. Step 3: Cross multiply
    1,087.30x = 1,629.72 × 539.86
  4. Step 4: Simplify right side
    1,087.30x = 879,820.64
  5. Step 5: Solve for x
    x = 879,820.64/1,087.30
  6. Step 6: Final answer
    x = 809.18

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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.