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Finding the Fourth Proportional to 1,402.94, 1,937.09 and 905.87

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Solution

The fourth proportional to 1,402.94, 1,937.09 and 905.87 is: 1,250.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,402.94 : 1,937.09 = 905.87 : x
  2. Step 2: Convert to fraction form
    1,402.94/1,937.09 = 905.87/x
  3. Step 3: Cross multiply
    1,402.94x = 1,937.09 × 905.87
  4. Step 4: Simplify right side
    1,402.94x = 1,754,758.83
  5. Step 5: Solve for x
    x = 1,754,758.83/1,402.94
  6. Step 6: Final answer
    x = 1,250.77

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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.