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Finding the Fourth Proportional to 619.17, 854.60 and 386.25

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Solution

The fourth proportional to 619.17, 854.60 and 386.25 is: 533.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.17 : 854.60 = 386.25 : x
  2. Step 2: Convert to fraction form
    619.17/854.60 = 386.25/x
  3. Step 3: Cross multiply
    619.17x = 854.60 × 386.25
  4. Step 4: Simplify right side
    619.17x = 330,087.32
  5. Step 5: Solve for x
    x = 330,087.32/619.17
  6. Step 6: Final answer
    x = 533.11

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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.