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Finding the Fourth Proportional to 645.39, 968.09 and 158.45

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Solution

The fourth proportional to 645.39, 968.09 and 158.45 is: 237.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.39 : 968.09 = 158.45 : x
  2. Step 2: Convert to fraction form
    645.39/968.09 = 158.45/x
  3. Step 3: Cross multiply
    645.39x = 968.09 × 158.45
  4. Step 4: Simplify right side
    645.39x = 153,388.23
  5. Step 5: Solve for x
    x = 153,388.23/645.39
  6. Step 6: Final answer
    x = 237.67

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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.