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Finding the Fourth Proportional to 1,090.95, 1,505.47 and 605.85

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Solution

The fourth proportional to 1,090.95, 1,505.47 and 605.85 is: 836.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,090.95 : 1,505.47 = 605.85 : x
  2. Step 2: Convert to fraction form
    1,090.95/1,505.47 = 605.85/x
  3. Step 3: Cross multiply
    1,090.95x = 1,505.47 × 605.85
  4. Step 4: Simplify right side
    1,090.95x = 912,089.00
  5. Step 5: Solve for x
    x = 912,089.00/1,090.95
  6. Step 6: Final answer
    x = 836.05

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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.