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Finding the Fourth Proportional to 680.37, 937.65 and 555.63

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Solution

The fourth proportional to 680.37, 937.65 and 555.63 is: 765.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.37 : 937.65 = 555.63 : x
  2. Step 2: Convert to fraction form
    680.37/937.65 = 555.63/x
  3. Step 3: Cross multiply
    680.37x = 937.65 × 555.63
  4. Step 4: Simplify right side
    680.37x = 520,986.47
  5. Step 5: Solve for x
    x = 520,986.47/680.37
  6. Step 6: Final answer
    x = 765.74

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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.