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Finding the Fourth Proportional to 583.99, 806.30 and 388.06

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Solution

The fourth proportional to 583.99, 806.30 and 388.06 is: 535.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.99 : 806.30 = 388.06 : x
  2. Step 2: Convert to fraction form
    583.99/806.30 = 388.06/x
  3. Step 3: Cross multiply
    583.99x = 806.30 × 388.06
  4. Step 4: Simplify right side
    583.99x = 312,892.78
  5. Step 5: Solve for x
    x = 312,892.78/583.99
  6. Step 6: Final answer
    x = 535.78

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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.