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Finding the Fourth Proportional to 621, 855.30 and 577.92

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Solution

The fourth proportional to 621, 855.30 and 577.92 is: 795.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    621 : 855.30 = 577.92 : x
  2. Step 2: Convert to fraction form
    621/855.30 = 577.92/x
  3. Step 3: Cross multiply
    621x = 855.30 × 577.92
  4. Step 4: Simplify right side
    621x = 494,294.98
  5. Step 5: Solve for x
    x = 494,294.98/621
  6. Step 6: Final answer
    x = 795.97

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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.