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Finding the Fourth Proportional to 694.06, 1,041.09 and 405.30

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Solution

The fourth proportional to 694.06, 1,041.09 and 405.30 is: 607.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.06 : 1,041.09 = 405.30 : x
  2. Step 2: Convert to fraction form
    694.06/1,041.09 = 405.30/x
  3. Step 3: Cross multiply
    694.06x = 1,041.09 × 405.30
  4. Step 4: Simplify right side
    694.06x = 421,953.78
  5. Step 5: Solve for x
    x = 421,953.78/694.06
  6. Step 6: Final answer
    x = 607.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.