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Finding the Fourth Proportional to 357.16, 495.19 and 345.16

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Solution

The fourth proportional to 357.16, 495.19 and 345.16 is: 478.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.16 : 495.19 = 345.16 : x
  2. Step 2: Convert to fraction form
    357.16/495.19 = 345.16/x
  3. Step 3: Cross multiply
    357.16x = 495.19 × 345.16
  4. Step 4: Simplify right side
    357.16x = 170,919.78
  5. Step 5: Solve for x
    x = 170,919.78/357.16
  6. Step 6: Final answer
    x = 478.55

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.