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Finding the Fourth Proportional to 379.97, 570.35 and 303.42

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Solution

The fourth proportional to 379.97, 570.35 and 303.42 is: 455.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.97 : 570.35 = 303.42 : x
  2. Step 2: Convert to fraction form
    379.97/570.35 = 303.42/x
  3. Step 3: Cross multiply
    379.97x = 570.35 × 303.42
  4. Step 4: Simplify right side
    379.97x = 173,055.60
  5. Step 5: Solve for x
    x = 173,055.60/379.97
  6. Step 6: Final answer
    x = 455.45

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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.