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Finding the Fourth Proportional to 648.18, 893.97 and 501.21

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Solution

The fourth proportional to 648.18, 893.97 and 501.21 is: 691.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.18 : 893.97 = 501.21 : x
  2. Step 2: Convert to fraction form
    648.18/893.97 = 501.21/x
  3. Step 3: Cross multiply
    648.18x = 893.97 × 501.21
  4. Step 4: Simplify right side
    648.18x = 448,066.70
  5. Step 5: Solve for x
    x = 448,066.70/648.18
  6. Step 6: Final answer
    x = 691.27

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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.