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Finding the Fourth Proportional to 419.33, 578.80 and 272.01

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Solution

The fourth proportional to 419.33, 578.80 and 272.01 is: 375.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.33 : 578.80 = 272.01 : x
  2. Step 2: Convert to fraction form
    419.33/578.80 = 272.01/x
  3. Step 3: Cross multiply
    419.33x = 578.80 × 272.01
  4. Step 4: Simplify right side
    419.33x = 157,437.11
  5. Step 5: Solve for x
    x = 157,437.11/419.33
  6. Step 6: Final answer
    x = 375.45

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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.