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Finding the Fourth Proportional to 509.96, 701.04 and 438.80

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Solution

The fourth proportional to 509.96, 701.04 and 438.80 is: 603.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.96 : 701.04 = 438.80 : x
  2. Step 2: Convert to fraction form
    509.96/701.04 = 438.80/x
  3. Step 3: Cross multiply
    509.96x = 701.04 × 438.80
  4. Step 4: Simplify right side
    509.96x = 307,612.85
  5. Step 5: Solve for x
    x = 307,612.85/509.96
  6. Step 6: Final answer
    x = 603.22

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.