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Finding the Fourth Proportional to 583.38, 875.16 and 388.80

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Solution

The fourth proportional to 583.38, 875.16 and 388.80 is: 583.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.38 : 875.16 = 388.80 : x
  2. Step 2: Convert to fraction form
    583.38/875.16 = 388.80/x
  3. Step 3: Cross multiply
    583.38x = 875.16 × 388.80
  4. Step 4: Simplify right side
    583.38x = 340,262.21
  5. Step 5: Solve for x
    x = 340,262.21/583.38
  6. Step 6: Final answer
    x = 583.26

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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.