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Finding the Fourth Proportional to 412.74, 569.55 and 247

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Solution

The fourth proportional to 412.74, 569.55 and 247 is: 340.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.74 : 569.55 = 247 : x
  2. Step 2: Convert to fraction form
    412.74/569.55 = 247/x
  3. Step 3: Cross multiply
    412.74x = 569.55 × 247
  4. Step 4: Simplify right side
    412.74x = 140,678.85
  5. Step 5: Solve for x
    x = 140,678.85/412.74
  6. Step 6: Final answer
    x = 340.84

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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.