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Finding the Fourth Proportional to 403.86, 557.20 and 277.83

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Solution

The fourth proportional to 403.86, 557.20 and 277.83 is: 383.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.86 : 557.20 = 277.83 : x
  2. Step 2: Convert to fraction form
    403.86/557.20 = 277.83/x
  3. Step 3: Cross multiply
    403.86x = 557.20 × 277.83
  4. Step 4: Simplify right side
    403.86x = 154,806.88
  5. Step 5: Solve for x
    x = 154,806.88/403.86
  6. Step 6: Final answer
    x = 383.32

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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.