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Finding the Fourth Proportional to 644.80, 971.26 and 587.38

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Solution

The fourth proportional to 644.80, 971.26 and 587.38 is: 884.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.80 : 971.26 = 587.38 : x
  2. Step 2: Convert to fraction form
    644.80/971.26 = 587.38/x
  3. Step 3: Cross multiply
    644.80x = 971.26 × 587.38
  4. Step 4: Simplify right side
    644.80x = 570,498.70
  5. Step 5: Solve for x
    x = 570,498.70/644.80
  6. Step 6: Final answer
    x = 884.77

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.