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Finding the Fourth Proportional to 679.13, 937.20 and 417.09

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Solution

The fourth proportional to 679.13, 937.20 and 417.09 is: 575.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.13 : 937.20 = 417.09 : x
  2. Step 2: Convert to fraction form
    679.13/937.20 = 417.09/x
  3. Step 3: Cross multiply
    679.13x = 937.20 × 417.09
  4. Step 4: Simplify right side
    679.13x = 390,901.83
  5. Step 5: Solve for x
    x = 390,901.83/679.13
  6. Step 6: Final answer
    x = 575.59

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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.