Home / 1,211.24-1,816.97-378.50

Finding the Fourth Proportional to 1,211.24, 1,816.97 and 378.50

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Solution

The fourth proportional to 1,211.24, 1,816.97 and 378.50 is: 567.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.24 : 1,816.97 = 378.50 : x
  2. Step 2: Convert to fraction form
    1,211.24/1,816.97 = 378.50/x
  3. Step 3: Cross multiply
    1,211.24x = 1,816.97 × 378.50
  4. Step 4: Simplify right side
    1,211.24x = 687,712.17
  5. Step 5: Solve for x
    x = 687,712.17/1,211.24
  6. Step 6: Final answer
    x = 567.77

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Double scale
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1.5x scale

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.