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Finding the Fourth Proportional to 680.57, 939.19 and 370.07

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Solution

The fourth proportional to 680.57, 939.19 and 370.07 is: 510.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.57 : 939.19 = 370.07 : x
  2. Step 2: Convert to fraction form
    680.57/939.19 = 370.07/x
  3. Step 3: Cross multiply
    680.57x = 939.19 × 370.07
  4. Step 4: Simplify right side
    680.57x = 347,561.35
  5. Step 5: Solve for x
    x = 347,561.35/680.57
  6. Step 6: Final answer
    x = 510.70

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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.