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Finding the Fourth Proportional to 1,140.08, 1,709.15 and 481.93

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Solution

The fourth proportional to 1,140.08, 1,709.15 and 481.93 is: 722.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,140.08 : 1,709.15 = 481.93 : x
  2. Step 2: Convert to fraction form
    1,140.08/1,709.15 = 481.93/x
  3. Step 3: Cross multiply
    1,140.08x = 1,709.15 × 481.93
  4. Step 4: Simplify right side
    1,140.08x = 823,690.66
  5. Step 5: Solve for x
    x = 823,690.66/1,140.08
  6. Step 6: Final answer
    x = 722.48

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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.