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Finding the Fourth Proportional to 449.55, 671.06 and 394.88

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Solution

The fourth proportional to 449.55, 671.06 and 394.88 is: 589.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.55 : 671.06 = 394.88 : x
  2. Step 2: Convert to fraction form
    449.55/671.06 = 394.88/x
  3. Step 3: Cross multiply
    449.55x = 671.06 × 394.88
  4. Step 4: Simplify right side
    449.55x = 264,984.69
  5. Step 5: Solve for x
    x = 264,984.69/449.55
  6. Step 6: Final answer
    x = 589.44

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1.5x scale

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.