Home / 1,890.72-2,829.60-1,670.40

Finding the Fourth Proportional to 1,890.72, 2,829.60 and 1,670.40

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Solution

The fourth proportional to 1,890.72, 2,829.60 and 1,670.40 is: 2,499.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.72 : 2,829.60 = 1,670.40 : x
  2. Step 2: Convert to fraction form
    1,890.72/2,829.60 = 1,670.40/x
  3. Step 3: Cross multiply
    1,890.72x = 2,829.60 × 1,670.40
  4. Step 4: Simplify right side
    1,890.72x = 4,726,563.84
  5. Step 5: Solve for x
    x = 4,726,563.84/1,890.72
  6. Step 6: Final answer
    x = 2,499.88

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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.