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Finding the Fourth Proportional to 1,484.88, 2,227.24 and 389.20

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Solution

The fourth proportional to 1,484.88, 2,227.24 and 389.20 is: 583.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,484.88 : 2,227.24 = 389.20 : x
  2. Step 2: Convert to fraction form
    1,484.88/2,227.24 = 389.20/x
  3. Step 3: Cross multiply
    1,484.88x = 2,227.24 × 389.20
  4. Step 4: Simplify right side
    1,484.88x = 866,841.81
  5. Step 5: Solve for x
    x = 866,841.81/1,484.88
  6. Step 6: Final answer
    x = 583.78

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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.