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Finding the Fourth Proportional to 406.63, 610.12 and 260.55

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Solution

The fourth proportional to 406.63, 610.12 and 260.55 is: 390.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.63 : 610.12 = 260.55 : x
  2. Step 2: Convert to fraction form
    406.63/610.12 = 260.55/x
  3. Step 3: Cross multiply
    406.63x = 610.12 × 260.55
  4. Step 4: Simplify right side
    406.63x = 158,963.83
  5. Step 5: Solve for x
    x = 158,963.83/406.63
  6. Step 6: Final answer
    x = 390.93

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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.