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Finding the Fourth Proportional to 1,440.73, 2,161.37 and 709.93

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Solution

The fourth proportional to 1,440.73, 2,161.37 and 709.93 is: 1,065.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.73 : 2,161.37 = 709.93 : x
  2. Step 2: Convert to fraction form
    1,440.73/2,161.37 = 709.93/x
  3. Step 3: Cross multiply
    1,440.73x = 2,161.37 × 709.93
  4. Step 4: Simplify right side
    1,440.73x = 1,534,417.85
  5. Step 5: Solve for x
    x = 1,534,417.85/1,440.73
  6. Step 6: Final answer
    x = 1,065.03

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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.