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Finding the Fourth Proportional to 1,269.42, 1,904.33 and 539

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Solution

The fourth proportional to 1,269.42, 1,904.33 and 539 is: 808.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,269.42 : 1,904.33 = 539 : x
  2. Step 2: Convert to fraction form
    1,269.42/1,904.33 = 539/x
  3. Step 3: Cross multiply
    1,269.42x = 1,904.33 × 539
  4. Step 4: Simplify right side
    1,269.42x = 1,026,433.87
  5. Step 5: Solve for x
    x = 1,026,433.87/1,269.42
  6. Step 6: Final answer
    x = 808.58

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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.