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Finding the Fourth Proportional to 1,443, 2,161.62 and 710.34

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Solution

The fourth proportional to 1,443, 2,161.62 and 710.34 is: 1,064.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,443 : 2,161.62 = 710.34 : x
  2. Step 2: Convert to fraction form
    1,443/2,161.62 = 710.34/x
  3. Step 3: Cross multiply
    1,443x = 2,161.62 × 710.34
  4. Step 4: Simplify right side
    1,443x = 1,535,485.15
  5. Step 5: Solve for x
    x = 1,535,485.15/1,443
  6. Step 6: Final answer
    x = 1,064.09

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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.