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Finding the Fourth Proportional to 640.73, 883.53 and 500.60

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Solution

The fourth proportional to 640.73, 883.53 and 500.60 is: 690.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.73 : 883.53 = 500.60 : x
  2. Step 2: Convert to fraction form
    640.73/883.53 = 500.60/x
  3. Step 3: Cross multiply
    640.73x = 883.53 × 500.60
  4. Step 4: Simplify right side
    640.73x = 442,290.70
  5. Step 5: Solve for x
    x = 442,290.70/640.73
  6. Step 6: Final answer
    x = 690.30

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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.