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Finding the Fourth Proportional to 578.34, 866.97 and 434.70

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Solution

The fourth proportional to 578.34, 866.97 and 434.70 is: 651.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.34 : 866.97 = 434.70 : x
  2. Step 2: Convert to fraction form
    578.34/866.97 = 434.70/x
  3. Step 3: Cross multiply
    578.34x = 866.97 × 434.70
  4. Step 4: Simplify right side
    578.34x = 376,871.86
  5. Step 5: Solve for x
    x = 376,871.86/578.34
  6. Step 6: Final answer
    x = 651.64

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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.