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Finding the Fourth Proportional to 578.39, 798.88 and 431.67

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Solution

The fourth proportional to 578.39, 798.88 and 431.67 is: 596.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.39 : 798.88 = 431.67 : x
  2. Step 2: Convert to fraction form
    578.39/798.88 = 431.67/x
  3. Step 3: Cross multiply
    578.39x = 798.88 × 431.67
  4. Step 4: Simplify right side
    578.39x = 344,852.53
  5. Step 5: Solve for x
    x = 344,852.53/578.39
  6. Step 6: Final answer
    x = 596.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.