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Finding the Fourth Proportional to 679.36, 937 and 417.28

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Solution

The fourth proportional to 679.36, 937 and 417.28 is: 575.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.36 : 937 = 417.28 : x
  2. Step 2: Convert to fraction form
    679.36/937 = 417.28/x
  3. Step 3: Cross multiply
    679.36x = 937 × 417.28
  4. Step 4: Simplify right side
    679.36x = 390,991.36
  5. Step 5: Solve for x
    x = 390,991.36/679.36
  6. Step 6: Final answer
    x = 575.53

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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.