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Finding the Fourth Proportional to 680.41, 937.90 and 623.91

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Solution

The fourth proportional to 680.41, 937.90 and 623.91 is: 860.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.41 : 937.90 = 623.91 : x
  2. Step 2: Convert to fraction form
    680.41/937.90 = 623.91/x
  3. Step 3: Cross multiply
    680.41x = 937.90 × 623.91
  4. Step 4: Simplify right side
    680.41x = 585,165.19
  5. Step 5: Solve for x
    x = 585,165.19/680.41
  6. Step 6: Final answer
    x = 860.02

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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.