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Finding the Fourth Proportional to 501.39, 751.46 and 439.55

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Solution

The fourth proportional to 501.39, 751.46 and 439.55 is: 658.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    501.39 : 751.46 = 439.55 : x
  2. Step 2: Convert to fraction form
    501.39/751.46 = 439.55/x
  3. Step 3: Cross multiply
    501.39x = 751.46 × 439.55
  4. Step 4: Simplify right side
    501.39x = 330,298.29
  5. Step 5: Solve for x
    x = 330,298.29/501.39
  6. Step 6: Final answer
    x = 658.77

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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.