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Finding the Fourth Proportional to 1,140.01, 1,571.09 and 890.93

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Solution

The fourth proportional to 1,140.01, 1,571.09 and 890.93 is: 1,227.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.01 : 1,571.09 = 890.93 : x
  2. Step 2: Convert to fraction form
    1,140.01/1,571.09 = 890.93/x
  3. Step 3: Cross multiply
    1,140.01x = 1,571.09 × 890.93
  4. Step 4: Simplify right side
    1,140.01x = 1,399,730.69
  5. Step 5: Solve for x
    x = 1,399,730.69/1,140.01
  6. Step 6: Final answer
    x = 1,227.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.