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Finding the Fourth Proportional to 688.03, 949.38 and 389.27

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Solution

The fourth proportional to 688.03, 949.38 and 389.27 is: 537.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.03 : 949.38 = 389.27 : x
  2. Step 2: Convert to fraction form
    688.03/949.38 = 389.27/x
  3. Step 3: Cross multiply
    688.03x = 949.38 × 389.27
  4. Step 4: Simplify right side
    688.03x = 369,566.07
  5. Step 5: Solve for x
    x = 369,566.07/688.03
  6. Step 6: Final answer
    x = 537.14

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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.