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Finding the Fourth Proportional to 442.14, 666.47 and 418.62

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Solution

The fourth proportional to 442.14, 666.47 and 418.62 is: 631.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.14 : 666.47 = 418.62 : x
  2. Step 2: Convert to fraction form
    442.14/666.47 = 418.62/x
  3. Step 3: Cross multiply
    442.14x = 666.47 × 418.62
  4. Step 4: Simplify right side
    442.14x = 278,995.58
  5. Step 5: Solve for x
    x = 278,995.58/442.14
  6. Step 6: Final answer
    x = 631.01

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.