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Finding the Fourth Proportional to 466.02, 642.31 and 387.08

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Solution

The fourth proportional to 466.02, 642.31 and 387.08 is: 533.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.02 : 642.31 = 387.08 : x
  2. Step 2: Convert to fraction form
    466.02/642.31 = 387.08/x
  3. Step 3: Cross multiply
    466.02x = 642.31 × 387.08
  4. Step 4: Simplify right side
    466.02x = 248,625.35
  5. Step 5: Solve for x
    x = 248,625.35/466.02
  6. Step 6: Final answer
    x = 533.51

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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.