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Finding the Fourth Proportional to 1,189.01, 1,784.30 and 896.72

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Solution

The fourth proportional to 1,189.01, 1,784.30 and 896.72 is: 1,345.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.01 : 1,784.30 = 896.72 : x
  2. Step 2: Convert to fraction form
    1,189.01/1,784.30 = 896.72/x
  3. Step 3: Cross multiply
    1,189.01x = 1,784.30 × 896.72
  4. Step 4: Simplify right side
    1,189.01x = 1,600,004.09
  5. Step 5: Solve for x
    x = 1,600,004.09/1,189.01
  6. Step 6: Final answer
    x = 1,345.67

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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.