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Finding the Fourth Proportional to 577.72, 797.56 and 400.92

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Solution

The fourth proportional to 577.72, 797.56 and 400.92 is: 553.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.72 : 797.56 = 400.92 : x
  2. Step 2: Convert to fraction form
    577.72/797.56 = 400.92/x
  3. Step 3: Cross multiply
    577.72x = 797.56 × 400.92
  4. Step 4: Simplify right side
    577.72x = 319,757.76
  5. Step 5: Solve for x
    x = 319,757.76/577.72
  6. Step 6: Final answer
    x = 553.48

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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.