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Finding the Fourth Proportional to 763.36, 1,144.32 and 378.16

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Solution

The fourth proportional to 763.36, 1,144.32 and 378.16 is: 566.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.36 : 1,144.32 = 378.16 : x
  2. Step 2: Convert to fraction form
    763.36/1,144.32 = 378.16/x
  3. Step 3: Cross multiply
    763.36x = 1,144.32 × 378.16
  4. Step 4: Simplify right side
    763.36x = 432,736.05
  5. Step 5: Solve for x
    x = 432,736.05/763.36
  6. Step 6: Final answer
    x = 566.88

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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.