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Finding the Fourth Proportional to 1,159.36, 1,739.31 and 379.36

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Solution

The fourth proportional to 1,159.36, 1,739.31 and 379.36 is: 569.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159.36 : 1,739.31 = 379.36 : x
  2. Step 2: Convert to fraction form
    1,159.36/1,739.31 = 379.36/x
  3. Step 3: Cross multiply
    1,159.36x = 1,739.31 × 379.36
  4. Step 4: Simplify right side
    1,159.36x = 659,824.64
  5. Step 5: Solve for x
    x = 659,824.64/1,159.36
  6. Step 6: Final answer
    x = 569.13

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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.