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Finding the Fourth Proportional to 578.88, 872.40 and 573.84

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Solution

The fourth proportional to 578.88, 872.40 and 573.84 is: 864.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.88 : 872.40 = 573.84 : x
  2. Step 2: Convert to fraction form
    578.88/872.40 = 573.84/x
  3. Step 3: Cross multiply
    578.88x = 872.40 × 573.84
  4. Step 4: Simplify right side
    578.88x = 500,618.02
  5. Step 5: Solve for x
    x = 500,618.02/578.88
  6. Step 6: Final answer
    x = 864.80

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.