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Finding the Fourth Proportional to 1,267.99, 1,900.70 and 528.14

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Solution

The fourth proportional to 1,267.99, 1,900.70 and 528.14 is: 791.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.99 : 1,900.70 = 528.14 : x
  2. Step 2: Convert to fraction form
    1,267.99/1,900.70 = 528.14/x
  3. Step 3: Cross multiply
    1,267.99x = 1,900.70 × 528.14
  4. Step 4: Simplify right side
    1,267.99x = 1,003,833.06
  5. Step 5: Solve for x
    x = 1,003,833.06/1,267.99
  6. Step 6: Final answer
    x = 791.68

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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.