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Finding the Fourth Proportional to 628.30, 940.88 and 396.49

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Solution

The fourth proportional to 628.30, 940.88 and 396.49 is: 593.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.30 : 940.88 = 396.49 : x
  2. Step 2: Convert to fraction form
    628.30/940.88 = 396.49/x
  3. Step 3: Cross multiply
    628.30x = 940.88 × 396.49
  4. Step 4: Simplify right side
    628.30x = 373,045.18
  5. Step 5: Solve for x
    x = 373,045.18/628.30
  6. Step 6: Final answer
    x = 593.74

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1.5x scale

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.