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Finding the Fourth Proportional to 583.47, 804.56 and 396.99

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Solution

The fourth proportional to 583.47, 804.56 and 396.99 is: 547.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.47 : 804.56 = 396.99 : x
  2. Step 2: Convert to fraction form
    583.47/804.56 = 396.99/x
  3. Step 3: Cross multiply
    583.47x = 804.56 × 396.99
  4. Step 4: Simplify right side
    583.47x = 319,400.29
  5. Step 5: Solve for x
    x = 319,400.29/583.47
  6. Step 6: Final answer
    x = 547.42

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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.