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Finding the Fourth Proportional to 419.53, 578.92 and 242.47

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Solution

The fourth proportional to 419.53, 578.92 and 242.47 is: 334.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.53 : 578.92 = 242.47 : x
  2. Step 2: Convert to fraction form
    419.53/578.92 = 242.47/x
  3. Step 3: Cross multiply
    419.53x = 578.92 × 242.47
  4. Step 4: Simplify right side
    419.53x = 140,370.66
  5. Step 5: Solve for x
    x = 140,370.66/419.53
  6. Step 6: Final answer
    x = 334.59

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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.