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Finding the Fourth Proportional to 578.35, 866.71 and 433.90

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Solution

The fourth proportional to 578.35, 866.71 and 433.90 is: 650.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.35 : 866.71 = 433.90 : x
  2. Step 2: Convert to fraction form
    578.35/866.71 = 433.90/x
  3. Step 3: Cross multiply
    578.35x = 866.71 × 433.90
  4. Step 4: Simplify right side
    578.35x = 376,065.47
  5. Step 5: Solve for x
    x = 376,065.47/578.35
  6. Step 6: Final answer
    x = 650.24

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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.