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Finding the Fourth Proportional to 679.36, 937.09 and 417.13

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Solution

The fourth proportional to 679.36, 937.09 and 417.13 is: 575.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.36 : 937.09 = 417.13 : x
  2. Step 2: Convert to fraction form
    679.36/937.09 = 417.13/x
  3. Step 3: Cross multiply
    679.36x = 937.09 × 417.13
  4. Step 4: Simplify right side
    679.36x = 390,888.35
  5. Step 5: Solve for x
    x = 390,888.35/679.36
  6. Step 6: Final answer
    x = 575.38

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1.5x scale

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.