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Finding the Fourth Proportional to 452.24, 623.36 and 378.16

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Solution

The fourth proportional to 452.24, 623.36 and 378.16 is: 521.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.24 : 623.36 = 378.16 : x
  2. Step 2: Convert to fraction form
    452.24/623.36 = 378.16/x
  3. Step 3: Cross multiply
    452.24x = 623.36 × 378.16
  4. Step 4: Simplify right side
    452.24x = 235,729.82
  5. Step 5: Solve for x
    x = 235,729.82/452.24
  6. Step 6: Final answer
    x = 521.25

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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.