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Finding the Fourth Proportional to 1,353.62, 2,030.26 and 379.79

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Solution

The fourth proportional to 1,353.62, 2,030.26 and 379.79 is: 569.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.62 : 2,030.26 = 379.79 : x
  2. Step 2: Convert to fraction form
    1,353.62/2,030.26 = 379.79/x
  3. Step 3: Cross multiply
    1,353.62x = 2,030.26 × 379.79
  4. Step 4: Simplify right side
    1,353.62x = 771,072.45
  5. Step 5: Solve for x
    x = 771,072.45/1,353.62
  6. Step 6: Final answer
    x = 569.64

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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.