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Finding the Fourth Proportional to 449.03, 671.86 and 312.34

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Solution

The fourth proportional to 449.03, 671.86 and 312.34 is: 467.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.03 : 671.86 = 312.34 : x
  2. Step 2: Convert to fraction form
    449.03/671.86 = 312.34/x
  3. Step 3: Cross multiply
    449.03x = 671.86 × 312.34
  4. Step 4: Simplify right side
    449.03x = 209,848.75
  5. Step 5: Solve for x
    x = 209,848.75/449.03
  6. Step 6: Final answer
    x = 467.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.