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Finding the Fourth Proportional to 645.02, 968.78 and 552.68

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Solution

The fourth proportional to 645.02, 968.78 and 552.68 is: 830.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.02 : 968.78 = 552.68 : x
  2. Step 2: Convert to fraction form
    645.02/968.78 = 552.68/x
  3. Step 3: Cross multiply
    645.02x = 968.78 × 552.68
  4. Step 4: Simplify right side
    645.02x = 535,422.57
  5. Step 5: Solve for x
    x = 535,422.57/645.02
  6. Step 6: Final answer
    x = 830.09

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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.