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Finding the Fourth Proportional to 468.10, 645.78 and 302.42

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Solution

The fourth proportional to 468.10, 645.78 and 302.42 is: 417.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.10 : 645.78 = 302.42 : x
  2. Step 2: Convert to fraction form
    468.10/645.78 = 302.42/x
  3. Step 3: Cross multiply
    468.10x = 645.78 × 302.42
  4. Step 4: Simplify right side
    468.10x = 195,296.79
  5. Step 5: Solve for x
    x = 195,296.79/468.10
  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.