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Finding the Fourth Proportional to 442.30, 609.66 and 417.70

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Solution

The fourth proportional to 442.30, 609.66 and 417.70 is: 575.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.30 : 609.66 = 417.70 : x
  2. Step 2: Convert to fraction form
    442.30/609.66 = 417.70/x
  3. Step 3: Cross multiply
    442.30x = 609.66 × 417.70
  4. Step 4: Simplify right side
    442.30x = 254,654.98
  5. Step 5: Solve for x
    x = 254,654.98/442.30
  6. Step 6: Final answer
    x = 575.75

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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.