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Finding the Fourth Proportional to 693.79, 958.08 and 445.55

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Solution

The fourth proportional to 693.79, 958.08 and 445.55 is: 615.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.79 : 958.08 = 445.55 : x
  2. Step 2: Convert to fraction form
    693.79/958.08 = 445.55/x
  3. Step 3: Cross multiply
    693.79x = 958.08 × 445.55
  4. Step 4: Simplify right side
    693.79x = 426,867.75
  5. Step 5: Solve for x
    x = 426,867.75/693.79
  6. Step 6: Final answer
    x = 615.27

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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.