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Finding the Fourth Proportional to 653.66, 981.05 and 379.37

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Solution

The fourth proportional to 653.66, 981.05 and 379.37 is: 569.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.66 : 981.05 = 379.37 : x
  2. Step 2: Convert to fraction form
    653.66/981.05 = 379.37/x
  3. Step 3: Cross multiply
    653.66x = 981.05 × 379.37
  4. Step 4: Simplify right side
    653.66x = 372,174.14
  5. Step 5: Solve for x
    x = 372,174.14/653.66
  6. Step 6: Final answer
    x = 569.37

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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.