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Finding the Fourth Proportional to 680.75, 939.44 and 370.25

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Solution

The fourth proportional to 680.75, 939.44 and 370.25 is: 510.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.75 : 939.44 = 370.25 : x
  2. Step 2: Convert to fraction form
    680.75/939.44 = 370.25/x
  3. Step 3: Cross multiply
    680.75x = 939.44 × 370.25
  4. Step 4: Simplify right side
    680.75x = 347,827.66
  5. Step 5: Solve for x
    x = 347,827.66/680.75
  6. Step 6: Final answer
    x = 510.95

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1.5x scale

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.