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Finding the Fourth Proportional to 1,428.56, 2,143.16 and 606.86

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Solution

The fourth proportional to 1,428.56, 2,143.16 and 606.86 is: 910.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.56 : 2,143.16 = 606.86 : x
  2. Step 2: Convert to fraction form
    1,428.56/2,143.16 = 606.86/x
  3. Step 3: Cross multiply
    1,428.56x = 2,143.16 × 606.86
  4. Step 4: Simplify right side
    1,428.56x = 1,300,588.88
  5. Step 5: Solve for x
    x = 1,300,588.88/1,428.56
  6. Step 6: Final answer
    x = 910.42

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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.