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Finding the Fourth Proportional to 557.15, 768.53 and 360.77

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Solution

The fourth proportional to 557.15, 768.53 and 360.77 is: 497.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.15 : 768.53 = 360.77 : x
  2. Step 2: Convert to fraction form
    557.15/768.53 = 360.77/x
  3. Step 3: Cross multiply
    557.15x = 768.53 × 360.77
  4. Step 4: Simplify right side
    557.15x = 277,262.69
  5. Step 5: Solve for x
    x = 277,262.69/557.15
  6. Step 6: Final answer
    x = 497.65

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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.