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Finding the Fourth Proportional to 1,407.04, 2,110.56 and 381.04

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Solution

The fourth proportional to 1,407.04, 2,110.56 and 381.04 is: 571.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.04 : 2,110.56 = 381.04 : x
  2. Step 2: Convert to fraction form
    1,407.04/2,110.56 = 381.04/x
  3. Step 3: Cross multiply
    1,407.04x = 2,110.56 × 381.04
  4. Step 4: Simplify right side
    1,407.04x = 804,207.78
  5. Step 5: Solve for x
    x = 804,207.78/1,407.04
  6. Step 6: Final answer
    x = 571.56

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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.