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Finding the Fourth Proportional to 823.24, 1,234.54 and 433.12

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Solution

The fourth proportional to 823.24, 1,234.54 and 433.12 is: 649.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.24 : 1,234.54 = 433.12 : x
  2. Step 2: Convert to fraction form
    823.24/1,234.54 = 433.12/x
  3. Step 3: Cross multiply
    823.24x = 1,234.54 × 433.12
  4. Step 4: Simplify right side
    823.24x = 534,703.96
  5. Step 5: Solve for x
    x = 534,703.96/823.24
  6. Step 6: Final answer
    x = 649.51

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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.