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Finding the Fourth Proportional to 615.91, 849.49 and 450.79

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Solution

The fourth proportional to 615.91, 849.49 and 450.79 is: 621.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.91 : 849.49 = 450.79 : x
  2. Step 2: Convert to fraction form
    615.91/849.49 = 450.79/x
  3. Step 3: Cross multiply
    615.91x = 849.49 × 450.79
  4. Step 4: Simplify right side
    615.91x = 382,941.60
  5. Step 5: Solve for x
    x = 382,941.60/615.91
  6. Step 6: Final answer
    x = 621.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.