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Finding the Fourth Proportional to 1,305.72, 1,955.43 and 1,043.91

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Solution

The fourth proportional to 1,305.72, 1,955.43 and 1,043.91 is: 1,563.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.72 : 1,955.43 = 1,043.91 : x
  2. Step 2: Convert to fraction form
    1,305.72/1,955.43 = 1,043.91/x
  3. Step 3: Cross multiply
    1,305.72x = 1,955.43 × 1,043.91
  4. Step 4: Simplify right side
    1,305.72x = 2,041,292.93
  5. Step 5: Solve for x
    x = 2,041,292.93/1,305.72
  6. Step 6: Final answer
    x = 1,563.35

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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.