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Finding the Fourth Proportional to 523.11, 720.99 and 429.15

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Solution

The fourth proportional to 523.11, 720.99 and 429.15 is: 591.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.11 : 720.99 = 429.15 : x
  2. Step 2: Convert to fraction form
    523.11/720.99 = 429.15/x
  3. Step 3: Cross multiply
    523.11x = 720.99 × 429.15
  4. Step 4: Simplify right side
    523.11x = 309,412.86
  5. Step 5: Solve for x
    x = 309,412.86/523.11
  6. Step 6: Final answer
    x = 591.49

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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.