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Finding the Fourth Proportional to 468.90, 646.95 and 303.21

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Solution

The fourth proportional to 468.90, 646.95 and 303.21 is: 418.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.90 : 646.95 = 303.21 : x
  2. Step 2: Convert to fraction form
    468.90/646.95 = 303.21/x
  3. Step 3: Cross multiply
    468.90x = 646.95 × 303.21
  4. Step 4: Simplify right side
    468.90x = 196,161.71
  5. Step 5: Solve for x
    x = 196,161.71/468.90
  6. Step 6: Final answer
    x = 418.34

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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.