Home / 1,086.70-1,631.35-624.80

Finding the Fourth Proportional to 1,086.70, 1,631.35 and 624.80

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Solution

The fourth proportional to 1,086.70, 1,631.35 and 624.80 is: 937.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.70 : 1,631.35 = 624.80 : x
  2. Step 2: Convert to fraction form
    1,086.70/1,631.35 = 624.80/x
  3. Step 3: Cross multiply
    1,086.70x = 1,631.35 × 624.80
  4. Step 4: Simplify right side
    1,086.70x = 1,019,267.48
  5. Step 5: Solve for x
    x = 1,019,267.48/1,086.70
  6. Step 6: Final answer
    x = 937.95

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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.