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Finding the Fourth Proportional to 561.86, 775.47 and 329

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Solution

The fourth proportional to 561.86, 775.47 and 329 is: 454.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.86 : 775.47 = 329 : x
  2. Step 2: Convert to fraction form
    561.86/775.47 = 329/x
  3. Step 3: Cross multiply
    561.86x = 775.47 × 329
  4. Step 4: Simplify right side
    561.86x = 255,129.63
  5. Step 5: Solve for x
    x = 255,129.63/561.86
  6. Step 6: Final answer
    x = 454.08

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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.