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Finding the Fourth Proportional to 1,890.36, 2,835.84 and 658.12

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Solution

The fourth proportional to 1,890.36, 2,835.84 and 658.12 is: 987.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.36 : 2,835.84 = 658.12 : x
  2. Step 2: Convert to fraction form
    1,890.36/2,835.84 = 658.12/x
  3. Step 3: Cross multiply
    1,890.36x = 2,835.84 × 658.12
  4. Step 4: Simplify right side
    1,890.36x = 1,866,305.55
  5. Step 5: Solve for x
    x = 1,866,305.55/1,890.36
  6. Step 6: Final answer
    x = 987.28

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1.5x scale

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.