Home / 1,428.90-2,142.23-563.86

Finding the Fourth Proportional to 1,428.90, 2,142.23 and 563.86

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Solution

The fourth proportional to 1,428.90, 2,142.23 and 563.86 is: 845.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.90 : 2,142.23 = 563.86 : x
  2. Step 2: Convert to fraction form
    1,428.90/2,142.23 = 563.86/x
  3. Step 3: Cross multiply
    1,428.90x = 2,142.23 × 563.86
  4. Step 4: Simplify right side
    1,428.90x = 1,207,917.81
  5. Step 5: Solve for x
    x = 1,207,917.81/1,428.90
  6. Step 6: Final answer
    x = 845.35

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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.