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Finding the Fourth Proportional to 452.37, 622.97 and 390.12

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Solution

The fourth proportional to 452.37, 622.97 and 390.12 is: 537.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.37 : 622.97 = 390.12 : x
  2. Step 2: Convert to fraction form
    452.37/622.97 = 390.12/x
  3. Step 3: Cross multiply
    452.37x = 622.97 × 390.12
  4. Step 4: Simplify right side
    452.37x = 243,031.11
  5. Step 5: Solve for x
    x = 243,031.11/452.37
  6. Step 6: Final answer
    x = 537.24

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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.