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Finding the Fourth Proportional to 500.36, 688.52 and 485.34

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Solution

The fourth proportional to 500.36, 688.52 and 485.34 is: 667.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.36 : 688.52 = 485.34 : x
  2. Step 2: Convert to fraction form
    500.36/688.52 = 485.34/x
  3. Step 3: Cross multiply
    500.36x = 688.52 × 485.34
  4. Step 4: Simplify right side
    500.36x = 334,166.30
  5. Step 5: Solve for x
    x = 334,166.30/500.36
  6. Step 6: Final answer
    x = 667.85

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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.