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Finding the Fourth Proportional to 1,858.56, 2,564.72 and 1,072.56

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Solution

The fourth proportional to 1,858.56, 2,564.72 and 1,072.56 is: 1,480.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,858.56 : 2,564.72 = 1,072.56 : x
  2. Step 2: Convert to fraction form
    1,858.56/2,564.72 = 1,072.56/x
  3. Step 3: Cross multiply
    1,858.56x = 2,564.72 × 1,072.56
  4. Step 4: Simplify right side
    1,858.56x = 2,750,816.08
  5. Step 5: Solve for x
    x = 2,750,816.08/1,858.56
  6. Step 6: Final answer
    x = 1,480.08

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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.