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Finding the Fourth Proportional to 468.20, 645.96 and 302.40

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Solution

The fourth proportional to 468.20, 645.96 and 302.40 is: 417.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.20 : 645.96 = 302.40 : x
  2. Step 2: Convert to fraction form
    468.20/645.96 = 302.40/x
  3. Step 3: Cross multiply
    468.20x = 645.96 × 302.40
  4. Step 4: Simplify right side
    468.20x = 195,338.30
  5. Step 5: Solve for x
    x = 195,338.30/468.20
  6. Step 6: Final answer
    x = 417.21

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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.