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Finding the Fourth Proportional to 619.15, 854.45 and 357.16

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Solution

The fourth proportional to 619.15, 854.45 and 357.16 is: 492.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.15 : 854.45 = 357.16 : x
  2. Step 2: Convert to fraction form
    619.15/854.45 = 357.16/x
  3. Step 3: Cross multiply
    619.15x = 854.45 × 357.16
  4. Step 4: Simplify right side
    619.15x = 305,175.36
  5. Step 5: Solve for x
    x = 305,175.36/619.15
  6. Step 6: Final answer
    x = 492.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.