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Finding the Fourth Proportional to 1,890.28, 2,835.42 and 522.28

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Solution

The fourth proportional to 1,890.28, 2,835.42 and 522.28 is: 783.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.28 : 2,835.42 = 522.28 : x
  2. Step 2: Convert to fraction form
    1,890.28/2,835.42 = 522.28/x
  3. Step 3: Cross multiply
    1,890.28x = 2,835.42 × 522.28
  4. Step 4: Simplify right side
    1,890.28x = 1,480,887.68
  5. Step 5: Solve for x
    x = 1,480,887.68/1,890.28
  6. Step 6: Final answer
    x = 783.42

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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.