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Finding the Fourth Proportional to 679.02, 936.99 and 384.30

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Solution

The fourth proportional to 679.02, 936.99 and 384.30 is: 530.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.02 : 936.99 = 384.30 : x
  2. Step 2: Convert to fraction form
    679.02/936.99 = 384.30/x
  3. Step 3: Cross multiply
    679.02x = 936.99 × 384.30
  4. Step 4: Simplify right side
    679.02x = 360,086.64
  5. Step 5: Solve for x
    x = 360,086.64/679.02
  6. Step 6: Final answer
    x = 530.31

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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.