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Finding the Fourth Proportional to 645.86, 968.77 and 158.91

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Solution

The fourth proportional to 645.86, 968.77 and 158.91 is: 238.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.86 : 968.77 = 158.91 : x
  2. Step 2: Convert to fraction form
    645.86/968.77 = 158.91/x
  3. Step 3: Cross multiply
    645.86x = 968.77 × 158.91
  4. Step 4: Simplify right side
    645.86x = 153,949.48
  5. Step 5: Solve for x
    x = 153,949.48/645.86
  6. Step 6: Final answer
    x = 238.36

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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.