Home / 1,485.27-2,048.63-987.66

Finding the Fourth Proportional to 1,485.27, 2,048.63 and 987.66

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Solution

The fourth proportional to 1,485.27, 2,048.63 and 987.66 is: 1,362.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.27 : 2,048.63 = 987.66 : x
  2. Step 2: Convert to fraction form
    1,485.27/2,048.63 = 987.66/x
  3. Step 3: Cross multiply
    1,485.27x = 2,048.63 × 987.66
  4. Step 4: Simplify right side
    1,485.27x = 2,023,344.97
  5. Step 5: Solve for x
    x = 2,023,344.97/1,485.27
  6. Step 6: Final answer
    x = 1,362.27

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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.