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Finding the Fourth Proportional to 1,068.70, 1,474.99 and 849.32

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Solution

The fourth proportional to 1,068.70, 1,474.99 and 849.32 is: 1,172.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,068.70 : 1,474.99 = 849.32 : x
  2. Step 2: Convert to fraction form
    1,068.70/1,474.99 = 849.32/x
  3. Step 3: Cross multiply
    1,068.70x = 1,474.99 × 849.32
  4. Step 4: Simplify right side
    1,068.70x = 1,252,738.51
  5. Step 5: Solve for x
    x = 1,252,738.51/1,068.70
  6. Step 6: Final answer
    x = 1,172.21

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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.