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Finding the Fourth Proportional to 1,263.42, 1,741.50 and 842.94

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Solution

The fourth proportional to 1,263.42, 1,741.50 and 842.94 is: 1,161.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.42 : 1,741.50 = 842.94 : x
  2. Step 2: Convert to fraction form
    1,263.42/1,741.50 = 842.94/x
  3. Step 3: Cross multiply
    1,263.42x = 1,741.50 × 842.94
  4. Step 4: Simplify right side
    1,263.42x = 1,467,980.01
  5. Step 5: Solve for x
    x = 1,467,980.01/1,263.42
  6. Step 6: Final answer
    x = 1,161.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.