Home / 1,087.80-1,631.14-357.20

Finding the Fourth Proportional to 1,087.80, 1,631.14 and 357.20

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Solution

The fourth proportional to 1,087.80, 1,631.14 and 357.20 is: 535.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.80 : 1,631.14 = 357.20 : x
  2. Step 2: Convert to fraction form
    1,087.80/1,631.14 = 357.20/x
  3. Step 3: Cross multiply
    1,087.80x = 1,631.14 × 357.20
  4. Step 4: Simplify right side
    1,087.80x = 582,643.21
  5. Step 5: Solve for x
    x = 582,643.21/1,087.80
  6. Step 6: Final answer
    x = 535.62

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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.