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Finding the Fourth Proportional to 578.88, 798.48 and 423.36

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Solution

The fourth proportional to 578.88, 798.48 and 423.36 is: 583.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.88 : 798.48 = 423.36 : x
  2. Step 2: Convert to fraction form
    578.88/798.48 = 423.36/x
  3. Step 3: Cross multiply
    578.88x = 798.48 × 423.36
  4. Step 4: Simplify right side
    578.88x = 338,044.49
  5. Step 5: Solve for x
    x = 338,044.49/578.88
  6. Step 6: Final answer
    x = 583.96

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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.