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Finding the Fourth Proportional to 573.80, 861.34 and 285.16

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Solution

The fourth proportional to 573.80, 861.34 and 285.16 is: 428.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.80 : 861.34 = 285.16 : x
  2. Step 2: Convert to fraction form
    573.80/861.34 = 285.16/x
  3. Step 3: Cross multiply
    573.80x = 861.34 × 285.16
  4. Step 4: Simplify right side
    573.80x = 245,619.71
  5. Step 5: Solve for x
    x = 245,619.71/573.80
  6. Step 6: Final answer
    x = 428.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.