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Finding the Fourth Proportional to 1,563.86, 2,346.77 and 742.14

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Solution

The fourth proportional to 1,563.86, 2,346.77 and 742.14 is: 1,113.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.86 : 2,346.77 = 742.14 : x
  2. Step 2: Convert to fraction form
    1,563.86/2,346.77 = 742.14/x
  3. Step 3: Cross multiply
    1,563.86x = 2,346.77 × 742.14
  4. Step 4: Simplify right side
    1,563.86x = 1,741,627.14
  5. Step 5: Solve for x
    x = 1,741,627.14/1,563.86
  6. Step 6: Final answer
    x = 1,113.67

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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.