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Finding the Fourth Proportional to 1,014.81, 1,399.73 and 858.48

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Solution

The fourth proportional to 1,014.81, 1,399.73 and 858.48 is: 1,184.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.81 : 1,399.73 = 858.48 : x
  2. Step 2: Convert to fraction form
    1,014.81/1,399.73 = 858.48/x
  3. Step 3: Cross multiply
    1,014.81x = 1,399.73 × 858.48
  4. Step 4: Simplify right side
    1,014.81x = 1,201,635.92
  5. Step 5: Solve for x
    x = 1,201,635.92/1,014.81
  6. Step 6: Final answer
    x = 1,184.10

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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.