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Finding the Fourth Proportional to 629.21, 940.08 and 607.68

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Solution

The fourth proportional to 629.21, 940.08 and 607.68 is: 907.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.21 : 940.08 = 607.68 : x
  2. Step 2: Convert to fraction form
    629.21/940.08 = 607.68/x
  3. Step 3: Cross multiply
    629.21x = 940.08 × 607.68
  4. Step 4: Simplify right side
    629.21x = 571,264.63
  5. Step 5: Solve for x
    x = 571,264.63/629.21
  6. Step 6: Final answer
    x = 907.91

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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.