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Finding the Fourth Proportional to 573, 790.74 and 311.02

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Solution

The fourth proportional to 573, 790.74 and 311.02 is: 429.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    573 : 790.74 = 311.02 : x
  2. Step 2: Convert to fraction form
    573/790.74 = 311.02/x
  3. Step 3: Cross multiply
    573x = 790.74 × 311.02
  4. Step 4: Simplify right side
    573x = 245,933.98
  5. Step 5: Solve for x
    x = 245,933.98/573
  6. Step 6: Final answer
    x = 429.20

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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.