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Finding the Fourth Proportional to 606.78, 910.56 and 260.45

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Solution

The fourth proportional to 606.78, 910.56 and 260.45 is: 390.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.78 : 910.56 = 260.45 : x
  2. Step 2: Convert to fraction form
    606.78/910.56 = 260.45/x
  3. Step 3: Cross multiply
    606.78x = 910.56 × 260.45
  4. Step 4: Simplify right side
    606.78x = 237,150.80
  5. Step 5: Solve for x
    x = 237,150.80/606.78
  6. Step 6: Final answer
    x = 390.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.