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Finding the Fourth Proportional to 419.52, 578.54 and 272.08

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Solution

The fourth proportional to 419.52, 578.54 and 272.08 is: 375.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.52 : 578.54 = 272.08 : x
  2. Step 2: Convert to fraction form
    419.52/578.54 = 272.08/x
  3. Step 3: Cross multiply
    419.52x = 578.54 × 272.08
  4. Step 4: Simplify right side
    419.52x = 157,409.16
  5. Step 5: Solve for x
    x = 157,409.16/419.52
  6. Step 6: Final answer
    x = 375.21

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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.