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Finding the Fourth Proportional to 504.12, 755.53 and 388.19

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Solution

The fourth proportional to 504.12, 755.53 and 388.19 is: 581.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.12 : 755.53 = 388.19 : x
  2. Step 2: Convert to fraction form
    504.12/755.53 = 388.19/x
  3. Step 3: Cross multiply
    504.12x = 755.53 × 388.19
  4. Step 4: Simplify right side
    504.12x = 293,290.11
  5. Step 5: Solve for x
    x = 293,290.11/504.12
  6. Step 6: Final answer
    x = 581.78

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Similar ratio
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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.