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Finding the Fourth Proportional to 328.32, 452.70 and 272.16

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Solution

The fourth proportional to 328.32, 452.70 and 272.16 is: 375.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.32 : 452.70 = 272.16 : x
  2. Step 2: Convert to fraction form
    328.32/452.70 = 272.16/x
  3. Step 3: Cross multiply
    328.32x = 452.70 × 272.16
  4. Step 4: Simplify right side
    328.32x = 123,206.83
  5. Step 5: Solve for x
    x = 123,206.83/328.32
  6. Step 6: Final answer
    x = 375.26

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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.