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Finding the Fourth Proportional to 694.74, 956.70 and 621.03

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Solution

The fourth proportional to 694.74, 956.70 and 621.03 is: 855.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.74 : 956.70 = 621.03 : x
  2. Step 2: Convert to fraction form
    694.74/956.70 = 621.03/x
  3. Step 3: Cross multiply
    694.74x = 956.70 × 621.03
  4. Step 4: Simplify right side
    694.74x = 594,139.40
  5. Step 5: Solve for x
    x = 594,139.40/694.74
  6. Step 6: Final answer
    x = 855.20

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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.