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Finding the Fourth Proportional to 908.70, 1,363.23 and 360.78

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Solution

The fourth proportional to 908.70, 1,363.23 and 360.78 is: 541.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.70 : 1,363.23 = 360.78 : x
  2. Step 2: Convert to fraction form
    908.70/1,363.23 = 360.78/x
  3. Step 3: Cross multiply
    908.70x = 1,363.23 × 360.78
  4. Step 4: Simplify right side
    908.70x = 491,826.12
  5. Step 5: Solve for x
    x = 491,826.12/908.70
  6. Step 6: Final answer
    x = 541.24

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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.