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Finding the Fourth Proportional to 514.38, 709.84 and 317.94

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Solution

The fourth proportional to 514.38, 709.84 and 317.94 is: 438.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.38 : 709.84 = 317.94 : x
  2. Step 2: Convert to fraction form
    514.38/709.84 = 317.94/x
  3. Step 3: Cross multiply
    514.38x = 709.84 × 317.94
  4. Step 4: Simplify right side
    514.38x = 225,686.53
  5. Step 5: Solve for x
    x = 225,686.53/514.38
  6. Step 6: Final answer
    x = 438.75

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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.