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Finding the Fourth Proportional to 1,890.55, 2,608.90 and 1,051.29

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Solution

The fourth proportional to 1,890.55, 2,608.90 and 1,051.29 is: 1,450.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.55 : 2,608.90 = 1,051.29 : x
  2. Step 2: Convert to fraction form
    1,890.55/2,608.90 = 1,051.29/x
  3. Step 3: Cross multiply
    1,890.55x = 2,608.90 × 1,051.29
  4. Step 4: Simplify right side
    1,890.55x = 2,742,710.48
  5. Step 5: Solve for x
    x = 2,742,710.48/1,890.55
  6. Step 6: Final answer
    x = 1,450.75

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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.