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Finding the Fourth Proportional to 694.41, 1,036.26 and 621.51

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Solution

The fourth proportional to 694.41, 1,036.26 and 621.51 is: 927.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.41 : 1,036.26 = 621.51 : x
  2. Step 2: Convert to fraction form
    694.41/1,036.26 = 621.51/x
  3. Step 3: Cross multiply
    694.41x = 1,036.26 × 621.51
  4. Step 4: Simplify right side
    694.41x = 644,045.95
  5. Step 5: Solve for x
    x = 644,045.95/694.41
  6. Step 6: Final answer
    x = 927.47

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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.