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Finding the Fourth Proportional to 620.38, 861.68 and 603.10

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Solution

The fourth proportional to 620.38, 861.68 and 603.10 is: 837.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.38 : 861.68 = 603.10 : x
  2. Step 2: Convert to fraction form
    620.38/861.68 = 603.10/x
  3. Step 3: Cross multiply
    620.38x = 861.68 × 603.10
  4. Step 4: Simplify right side
    620.38x = 519,679.21
  5. Step 5: Solve for x
    x = 519,679.21/620.38
  6. Step 6: Final answer
    x = 837.68

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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.