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Finding the Fourth Proportional to 543.77, 814.43 and 389.87

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Solution

The fourth proportional to 543.77, 814.43 and 389.87 is: 583.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.77 : 814.43 = 389.87 : x
  2. Step 2: Convert to fraction form
    543.77/814.43 = 389.87/x
  3. Step 3: Cross multiply
    543.77x = 814.43 × 389.87
  4. Step 4: Simplify right side
    543.77x = 317,515.80
  5. Step 5: Solve for x
    x = 317,515.80/543.77
  6. Step 6: Final answer
    x = 583.92

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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.