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Finding the Fourth Proportional to 406.94, 610.64 and 315.82

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Solution

The fourth proportional to 406.94, 610.64 and 315.82 is: 473.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.94 : 610.64 = 315.82 : x
  2. Step 2: Convert to fraction form
    406.94/610.64 = 315.82/x
  3. Step 3: Cross multiply
    406.94x = 610.64 × 315.82
  4. Step 4: Simplify right side
    406.94x = 192,852.32
  5. Step 5: Solve for x
    x = 192,852.32/406.94
  6. Step 6: Final answer
    x = 473.91

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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.