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Finding the Fourth Proportional to 679.93, 936.85 and 458.49

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Solution

The fourth proportional to 679.93, 936.85 and 458.49 is: 631.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.93 : 936.85 = 458.49 : x
  2. Step 2: Convert to fraction form
    679.93/936.85 = 458.49/x
  3. Step 3: Cross multiply
    679.93x = 936.85 × 458.49
  4. Step 4: Simplify right side
    679.93x = 429,536.36
  5. Step 5: Solve for x
    x = 429,536.36/679.93
  6. Step 6: Final answer
    x = 631.74

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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.