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Finding the Fourth Proportional to 576.12, 794.86 and 401.40

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Solution

The fourth proportional to 576.12, 794.86 and 401.40 is: 553.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.12 : 794.86 = 401.40 : x
  2. Step 2: Convert to fraction form
    576.12/794.86 = 401.40/x
  3. Step 3: Cross multiply
    576.12x = 794.86 × 401.40
  4. Step 4: Simplify right side
    576.12x = 319,056.80
  5. Step 5: Solve for x
    x = 319,056.80/576.12
  6. Step 6: Final answer
    x = 553.80

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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.