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Finding the Fourth Proportional to 1,523.09, 2,101.74 and 860.00

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Solution

The fourth proportional to 1,523.09, 2,101.74 and 860.00 is: 1,186.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,523.09 : 2,101.74 = 860.00 : x
  2. Step 2: Convert to fraction form
    1,523.09/2,101.74 = 860.00/x
  3. Step 3: Cross multiply
    1,523.09x = 2,101.74 × 860.00
  4. Step 4: Simplify right side
    1,523.09x = 1,807,485.89
  5. Step 5: Solve for x
    x = 1,807,485.89/1,523.09
  6. Step 6: Final answer
    x = 1,186.73

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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.