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Finding the Fourth Proportional to 1,405.96, 2,107.54 and 943.96

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Solution

The fourth proportional to 1,405.96, 2,107.54 and 943.96 is: 1,415.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405.96 : 2,107.54 = 943.96 : x
  2. Step 2: Convert to fraction form
    1,405.96/2,107.54 = 943.96/x
  3. Step 3: Cross multiply
    1,405.96x = 2,107.54 × 943.96
  4. Step 4: Simplify right side
    1,405.96x = 1,989,433.46
  5. Step 5: Solve for x
    x = 1,989,433.46/1,405.96
  6. Step 6: Final answer
    x = 1,415.00

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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.