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Finding the Fourth Proportional to 509.33, 703.23 and 398.61

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Solution

The fourth proportional to 509.33, 703.23 and 398.61 is: 550.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.33 : 703.23 = 398.61 : x
  2. Step 2: Convert to fraction form
    509.33/703.23 = 398.61/x
  3. Step 3: Cross multiply
    509.33x = 703.23 × 398.61
  4. Step 4: Simplify right side
    509.33x = 280,314.51
  5. Step 5: Solve for x
    x = 280,314.51/509.33
  6. Step 6: Final answer
    x = 550.36

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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.