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Finding the Fourth Proportional to 1,890.13, 2,835.20 and 573.90

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Solution

The fourth proportional to 1,890.13, 2,835.20 and 573.90 is: 860.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.13 : 2,835.20 = 573.90 : x
  2. Step 2: Convert to fraction form
    1,890.13/2,835.20 = 573.90/x
  3. Step 3: Cross multiply
    1,890.13x = 2,835.20 × 573.90
  4. Step 4: Simplify right side
    1,890.13x = 1,627,107.10
  5. Step 5: Solve for x
    x = 1,627,107.10/1,890.13
  6. Step 6: Final answer
    x = 860.84

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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.