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Finding the Fourth Proportional to 1,274.48, 1,911.68 and 700.96

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Solution

The fourth proportional to 1,274.48, 1,911.68 and 700.96 is: 1,051.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.48 : 1,911.68 = 700.96 : x
  2. Step 2: Convert to fraction form
    1,274.48/1,911.68 = 700.96/x
  3. Step 3: Cross multiply
    1,274.48x = 1,911.68 × 700.96
  4. Step 4: Simplify right side
    1,274.48x = 1,340,011.21
  5. Step 5: Solve for x
    x = 1,340,011.21/1,274.48
  6. Step 6: Final answer
    x = 1,051.42

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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.