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Finding the Fourth Proportional to 1,558.58, 2,150.80 and 850.39

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Solution

The fourth proportional to 1,558.58, 2,150.80 and 850.39 is: 1,173.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,558.58 : 2,150.80 = 850.39 : x
  2. Step 2: Convert to fraction form
    1,558.58/2,150.80 = 850.39/x
  3. Step 3: Cross multiply
    1,558.58x = 2,150.80 × 850.39
  4. Step 4: Simplify right side
    1,558.58x = 1,829,011.31
  5. Step 5: Solve for x
    x = 1,829,011.31/1,558.58
  6. Step 6: Final answer
    x = 1,173.52

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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.