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Finding the Fourth Proportional to 1,558.04, 2,150.09 and 859.41

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Solution

The fourth proportional to 1,558.04, 2,150.09 and 859.41 is: 1,185.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,558.04 : 2,150.09 = 859.41 : x
  2. Step 2: Convert to fraction form
    1,558.04/2,150.09 = 859.41/x
  3. Step 3: Cross multiply
    1,558.04x = 2,150.09 × 859.41
  4. Step 4: Simplify right side
    1,558.04x = 1,847,804.55
  5. Step 5: Solve for x
    x = 1,847,804.55/1,558.04
  6. Step 6: Final answer
    x = 1,185.98

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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.