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Finding the Fourth Proportional to 487.56, 671.34 and 466.68

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Solution

The fourth proportional to 487.56, 671.34 and 466.68 is: 642.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.56 : 671.34 = 466.68 : x
  2. Step 2: Convert to fraction form
    487.56/671.34 = 466.68/x
  3. Step 3: Cross multiply
    487.56x = 671.34 × 466.68
  4. Step 4: Simplify right side
    487.56x = 313,300.95
  5. Step 5: Solve for x
    x = 313,300.95/487.56
  6. Step 6: Final answer
    x = 642.59

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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.