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Finding the Fourth Proportional to 645.46, 968.76 and 402.46

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Solution

The fourth proportional to 645.46, 968.76 and 402.46 is: 604.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.46 : 968.76 = 402.46 : x
  2. Step 2: Convert to fraction form
    645.46/968.76 = 402.46/x
  3. Step 3: Cross multiply
    645.46x = 968.76 × 402.46
  4. Step 4: Simplify right side
    645.46x = 389,887.15
  5. Step 5: Solve for x
    x = 389,887.15/645.46
  6. Step 6: Final answer
    x = 604.05

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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.