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Finding the Fourth Proportional to 1,379.90, 2,064.98 and 1,052.66

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Solution

The fourth proportional to 1,379.90, 2,064.98 and 1,052.66 is: 1,575.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379.90 : 2,064.98 = 1,052.66 : x
  2. Step 2: Convert to fraction form
    1,379.90/2,064.98 = 1,052.66/x
  3. Step 3: Cross multiply
    1,379.90x = 2,064.98 × 1,052.66
  4. Step 4: Simplify right side
    1,379.90x = 2,173,706.26
  5. Step 5: Solve for x
    x = 2,173,706.26/1,379.90
  6. Step 6: Final answer
    x = 1,575.27

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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.