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Finding the Fourth Proportional to 679.03, 936.31 and 417.05

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Solution

The fourth proportional to 679.03, 936.31 and 417.05 is: 575.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.03 : 936.31 = 417.05 : x
  2. Step 2: Convert to fraction form
    679.03/936.31 = 417.05/x
  3. Step 3: Cross multiply
    679.03x = 936.31 × 417.05
  4. Step 4: Simplify right side
    679.03x = 390,486.65
  5. Step 5: Solve for x
    x = 390,486.65/679.03
  6. Step 6: Final answer
    x = 575.06

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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.