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Finding the Fourth Proportional to 442.29, 662.72 and 312.35

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Solution

The fourth proportional to 442.29, 662.72 and 312.35 is: 468.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.29 : 662.72 = 312.35 : x
  2. Step 2: Convert to fraction form
    442.29/662.72 = 312.35/x
  3. Step 3: Cross multiply
    442.29x = 662.72 × 312.35
  4. Step 4: Simplify right side
    442.29x = 207,000.59
  5. Step 5: Solve for x
    x = 207,000.59/442.29
  6. Step 6: Final answer
    x = 468.02

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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.