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Finding the Fourth Proportional to 374.45, 515.02 and 300.60

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Solution

The fourth proportional to 374.45, 515.02 and 300.60 is: 413.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.45 : 515.02 = 300.60 : x
  2. Step 2: Convert to fraction form
    374.45/515.02 = 300.60/x
  3. Step 3: Cross multiply
    374.45x = 515.02 × 300.60
  4. Step 4: Simplify right side
    374.45x = 154,813.51
  5. Step 5: Solve for x
    x = 154,813.51/374.45
  6. Step 6: Final answer
    x = 413.45

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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.