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Finding the Fourth Proportional to 429.66, 591.48 and 385.92

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Solution

The fourth proportional to 429.66, 591.48 and 385.92 is: 531.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    429.66 : 591.48 = 385.92 : x
  2. Step 2: Convert to fraction form
    429.66/591.48 = 385.92/x
  3. Step 3: Cross multiply
    429.66x = 591.48 × 385.92
  4. Step 4: Simplify right side
    429.66x = 228,263.96
  5. Step 5: Solve for x
    x = 228,263.96/429.66
  6. Step 6: Final answer
    x = 531.27

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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.