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Finding the Fourth Proportional to 1,051.57, 1,447.90 and 901.99

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Solution

The fourth proportional to 1,051.57, 1,447.90 and 901.99 is: 1,241.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.57 : 1,447.90 = 901.99 : x
  2. Step 2: Convert to fraction form
    1,051.57/1,447.90 = 901.99/x
  3. Step 3: Cross multiply
    1,051.57x = 1,447.90 × 901.99
  4. Step 4: Simplify right side
    1,051.57x = 1,305,991.32
  5. Step 5: Solve for x
    x = 1,305,991.32/1,051.57
  6. Step 6: Final answer
    x = 1,241.94

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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.