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Finding the Fourth Proportional to 3,579.07, 5,368.84 and 1,239.30

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Solution

The fourth proportional to 3,579.07, 5,368.84 and 1,239.30 is: 1,859.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,579.07 : 5,368.84 = 1,239.30 : x
  2. Step 2: Convert to fraction form
    3,579.07/5,368.84 = 1,239.30/x
  3. Step 3: Cross multiply
    3,579.07x = 5,368.84 × 1,239.30
  4. Step 4: Simplify right side
    3,579.07x = 6,653,603.41
  5. Step 5: Solve for x
    x = 6,653,603.41/3,579.07
  6. Step 6: Final answer
    x = 1,859.03

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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.