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Finding the Fourth Proportional to 615.70, 849.84 and 419.54

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Solution

The fourth proportional to 615.70, 849.84 and 419.54 is: 579.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.70 : 849.84 = 419.54 : x
  2. Step 2: Convert to fraction form
    615.70/849.84 = 419.54/x
  3. Step 3: Cross multiply
    615.70x = 849.84 × 419.54
  4. Step 4: Simplify right side
    615.70x = 356,541.87
  5. Step 5: Solve for x
    x = 356,541.87/615.70
  6. Step 6: Final answer
    x = 579.09

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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.