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Finding the Fourth Proportional to 379.64, 570.52 and 225.59

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Solution

The fourth proportional to 379.64, 570.52 and 225.59 is: 339.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.64 : 570.52 = 225.59 : x
  2. Step 2: Convert to fraction form
    379.64/570.52 = 225.59/x
  3. Step 3: Cross multiply
    379.64x = 570.52 × 225.59
  4. Step 4: Simplify right side
    379.64x = 128,700.19
  5. Step 5: Solve for x
    x = 128,700.19/379.64
  6. Step 6: Final answer
    x = 339.01

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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.