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Finding the Fourth Proportional to 505.48, 755.33 and 379.57

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Solution

The fourth proportional to 505.48, 755.33 and 379.57 is: 567.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.48 : 755.33 = 379.57 : x
  2. Step 2: Convert to fraction form
    505.48/755.33 = 379.57/x
  3. Step 3: Cross multiply
    505.48x = 755.33 × 379.57
  4. Step 4: Simplify right side
    505.48x = 286,696.82
  5. Step 5: Solve for x
    x = 286,696.82/505.48
  6. Step 6: Final answer
    x = 567.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.