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Finding the Fourth Proportional to 629.08, 939.90 and 607.55

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Solution

The fourth proportional to 629.08, 939.90 and 607.55 is: 907.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.08 : 939.90 = 607.55 : x
  2. Step 2: Convert to fraction form
    629.08/939.90 = 607.55/x
  3. Step 3: Cross multiply
    629.08x = 939.90 × 607.55
  4. Step 4: Simplify right side
    629.08x = 571,036.25
  5. Step 5: Solve for x
    x = 571,036.25/629.08
  6. Step 6: Final answer
    x = 907.73

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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.