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Finding the Fourth Proportional to 1,091.34, 1,505.40 and 1,018.44

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Solution

The fourth proportional to 1,091.34, 1,505.40 and 1,018.44 is: 1,404.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091.34 : 1,505.40 = 1,018.44 : x
  2. Step 2: Convert to fraction form
    1,091.34/1,505.40 = 1,018.44/x
  3. Step 3: Cross multiply
    1,091.34x = 1,505.40 × 1,018.44
  4. Step 4: Simplify right side
    1,091.34x = 1,533,159.58
  5. Step 5: Solve for x
    x = 1,533,159.58/1,091.34
  6. Step 6: Final answer
    x = 1,404.84

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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.