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Finding the Fourth Proportional to 577.80, 865.86 and 372.06

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Solution

The fourth proportional to 577.80, 865.86 and 372.06 is: 557.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.80 : 865.86 = 372.06 : x
  2. Step 2: Convert to fraction form
    577.80/865.86 = 372.06/x
  3. Step 3: Cross multiply
    577.80x = 865.86 × 372.06
  4. Step 4: Simplify right side
    577.80x = 322,151.87
  5. Step 5: Solve for x
    x = 322,151.87/577.80
  6. Step 6: Final answer
    x = 557.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.