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Finding the Fourth Proportional to 829.34, 1,144.32 and 475.20

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Solution

The fourth proportional to 829.34, 1,144.32 and 475.20 is: 655.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.34 : 1,144.32 = 475.20 : x
  2. Step 2: Convert to fraction form
    829.34/1,144.32 = 475.20/x
  3. Step 3: Cross multiply
    829.34x = 1,144.32 × 475.20
  4. Step 4: Simplify right side
    829.34x = 543,780.86
  5. Step 5: Solve for x
    x = 543,780.86/829.34
  6. Step 6: Final answer
    x = 655.68

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.