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Finding the Fourth Proportional to 451.50, 621.18 and 402.27

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Solution

The fourth proportional to 451.50, 621.18 and 402.27 is: 553.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.50 : 621.18 = 402.27 : x
  2. Step 2: Convert to fraction form
    451.50/621.18 = 402.27/x
  3. Step 3: Cross multiply
    451.50x = 621.18 × 402.27
  4. Step 4: Simplify right side
    451.50x = 249,882.08
  5. Step 5: Solve for x
    x = 249,882.08/451.50
  6. Step 6: Final answer
    x = 553.45

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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.