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Finding the Fourth Proportional to 1,572.06, 2,169.63 and 900.11

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Solution

The fourth proportional to 1,572.06, 2,169.63 and 900.11 is: 1,242.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.06 : 2,169.63 = 900.11 : x
  2. Step 2: Convert to fraction form
    1,572.06/2,169.63 = 900.11/x
  3. Step 3: Cross multiply
    1,572.06x = 2,169.63 × 900.11
  4. Step 4: Simplify right side
    1,572.06x = 1,952,912.21
  5. Step 5: Solve for x
    x = 1,952,912.21/1,572.06
  6. Step 6: Final answer
    x = 1,242.27

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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.