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Finding the Fourth Proportional to 1,087.99, 1,631.80 and 357.57

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Solution

The fourth proportional to 1,087.99, 1,631.80 and 357.57 is: 536.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.99 : 1,631.80 = 357.57 : x
  2. Step 2: Convert to fraction form
    1,087.99/1,631.80 = 357.57/x
  3. Step 3: Cross multiply
    1,087.99x = 1,631.80 × 357.57
  4. Step 4: Simplify right side
    1,087.99x = 583,482.73
  5. Step 5: Solve for x
    x = 583,482.73/1,087.99
  6. Step 6: Final answer
    x = 536.29

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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.