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Finding the Fourth Proportional to 1,458.81, 2,185.31 and 677.77

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Solution

The fourth proportional to 1,458.81, 2,185.31 and 677.77 is: 1,015.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,458.81 : 2,185.31 = 677.77 : x
  2. Step 2: Convert to fraction form
    1,458.81/2,185.31 = 677.77/x
  3. Step 3: Cross multiply
    1,458.81x = 2,185.31 × 677.77
  4. Step 4: Simplify right side
    1,458.81x = 1,481,133.79
  5. Step 5: Solve for x
    x = 1,481,133.79/1,458.81
  6. Step 6: Final answer
    x = 1,015.30

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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.