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Finding the Fourth Proportional to 1,476.99, 2,215.47 and 381.34

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Solution

The fourth proportional to 1,476.99, 2,215.47 and 381.34 is: 572.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,476.99 : 2,215.47 = 381.34 : x
  2. Step 2: Convert to fraction form
    1,476.99/2,215.47 = 381.34/x
  3. Step 3: Cross multiply
    1,476.99x = 2,215.47 × 381.34
  4. Step 4: Simplify right side
    1,476.99x = 844,847.33
  5. Step 5: Solve for x
    x = 844,847.33/1,476.99
  6. Step 6: Final answer
    x = 572.01

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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.