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Finding the Fourth Proportional to 1,484.90, 2,228.72 and 755

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Solution

The fourth proportional to 1,484.90, 2,228.72 and 755 is: 1,133.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,484.90 : 2,228.72 = 755 : x
  2. Step 2: Convert to fraction form
    1,484.90/2,228.72 = 755/x
  3. Step 3: Cross multiply
    1,484.90x = 2,228.72 × 755
  4. Step 4: Simplify right side
    1,484.90x = 1,682,683.60
  5. Step 5: Solve for x
    x = 1,682,683.60/1,484.90
  6. Step 6: Final answer
    x = 1,133.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.