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Finding the Fourth Proportional to 668.55, 926.64 and 630.11

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Solution

The fourth proportional to 668.55, 926.64 and 630.11 is: 873.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.55 : 926.64 = 630.11 : x
  2. Step 2: Convert to fraction form
    668.55/926.64 = 630.11/x
  3. Step 3: Cross multiply
    668.55x = 926.64 × 630.11
  4. Step 4: Simplify right side
    668.55x = 583,885.13
  5. Step 5: Solve for x
    x = 583,885.13/668.55
  6. Step 6: Final answer
    x = 873.36

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.