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Finding the Fourth Proportional to 943.06, 1,411.99 and 711.25

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Solution

The fourth proportional to 943.06, 1,411.99 and 711.25 is: 1,064.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.06 : 1,411.99 = 711.25 : x
  2. Step 2: Convert to fraction form
    943.06/1,411.99 = 711.25/x
  3. Step 3: Cross multiply
    943.06x = 1,411.99 × 711.25
  4. Step 4: Simplify right side
    943.06x = 1,004,277.89
  5. Step 5: Solve for x
    x = 1,004,277.89/943.06
  6. Step 6: Final answer
    x = 1,064.91

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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.