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Finding the Fourth Proportional to 694.91, 960.34 and 621.10

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Solution

The fourth proportional to 694.91, 960.34 and 621.10 is: 858.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.91 : 960.34 = 621.10 : x
  2. Step 2: Convert to fraction form
    694.91/960.34 = 621.10/x
  3. Step 3: Cross multiply
    694.91x = 960.34 × 621.10
  4. Step 4: Simplify right side
    694.91x = 596,467.17
  5. Step 5: Solve for x
    x = 596,467.17/694.91
  6. Step 6: Final answer
    x = 858.34

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1.5x scale

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.