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Finding the Fourth Proportional to 570.15, 786.69 and 349.07

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Solution

The fourth proportional to 570.15, 786.69 and 349.07 is: 481.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.15 : 786.69 = 349.07 : x
  2. Step 2: Convert to fraction form
    570.15/786.69 = 349.07/x
  3. Step 3: Cross multiply
    570.15x = 786.69 × 349.07
  4. Step 4: Simplify right side
    570.15x = 274,605.94
  5. Step 5: Solve for x
    x = 274,605.94/570.15
  6. Step 6: Final answer
    x = 481.64

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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.