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Finding the Fourth Proportional to 503.41, 754.21 and 438.61

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Solution

The fourth proportional to 503.41, 754.21 and 438.61 is: 657.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.41 : 754.21 = 438.61 : x
  2. Step 2: Convert to fraction form
    503.41/754.21 = 438.61/x
  3. Step 3: Cross multiply
    503.41x = 754.21 × 438.61
  4. Step 4: Simplify right side
    503.41x = 330,804.05
  5. Step 5: Solve for x
    x = 330,804.05/503.41
  6. Step 6: Final answer
    x = 657.13

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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.