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Finding the Fourth Proportional to 695.34, 1,037.65 and 621.44

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Solution

The fourth proportional to 695.34, 1,037.65 and 621.44 is: 927.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    695.34 : 1,037.65 = 621.44 : x
  2. Step 2: Convert to fraction form
    695.34/1,037.65 = 621.44/x
  3. Step 3: Cross multiply
    695.34x = 1,037.65 × 621.44
  4. Step 4: Simplify right side
    695.34x = 644,837.22
  5. Step 5: Solve for x
    x = 644,837.22/695.34
  6. Step 6: Final answer
    x = 927.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.