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Finding the Fourth Proportional to 621, 855.90 and 583.38

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Solution

The fourth proportional to 621, 855.90 and 583.38 is: 804.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    621 : 855.90 = 583.38 : x
  2. Step 2: Convert to fraction form
    621/855.90 = 583.38/x
  3. Step 3: Cross multiply
    621x = 855.90 × 583.38
  4. Step 4: Simplify right side
    621x = 499,314.94
  5. Step 5: Solve for x
    x = 499,314.94/621
  6. Step 6: Final answer
    x = 804.05

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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.