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Finding the Fourth Proportional to 1,160.40, 1,740.69 and 511.59

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Solution

The fourth proportional to 1,160.40, 1,740.69 and 511.59 is: 767.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,160.40 : 1,740.69 = 511.59 : x
  2. Step 2: Convert to fraction form
    1,160.40/1,740.69 = 511.59/x
  3. Step 3: Cross multiply
    1,160.40x = 1,740.69 × 511.59
  4. Step 4: Simplify right side
    1,160.40x = 890,519.60
  5. Step 5: Solve for x
    x = 890,519.60/1,160.40
  6. Step 6: Final answer
    x = 767.42

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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.