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Finding the Fourth Proportional to 558.84, 771.66 and 401.81

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Solution

The fourth proportional to 558.84, 771.66 and 401.81 is: 554.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.84 : 771.66 = 401.81 : x
  2. Step 2: Convert to fraction form
    558.84/771.66 = 401.81/x
  3. Step 3: Cross multiply
    558.84x = 771.66 × 401.81
  4. Step 4: Simplify right side
    558.84x = 310,056.85
  5. Step 5: Solve for x
    x = 310,056.85/558.84
  6. Step 6: Final answer
    x = 554.82

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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.