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Finding the Fourth Proportional to 1,120.93, 1,673.20 and 1,039.62

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Solution

The fourth proportional to 1,120.93, 1,673.20 and 1,039.62 is: 1,551.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.93 : 1,673.20 = 1,039.62 : x
  2. Step 2: Convert to fraction form
    1,120.93/1,673.20 = 1,039.62/x
  3. Step 3: Cross multiply
    1,120.93x = 1,673.20 × 1,039.62
  4. Step 4: Simplify right side
    1,120.93x = 1,739,492.18
  5. Step 5: Solve for x
    x = 1,739,492.18/1,120.93
  6. Step 6: Final answer
    x = 1,551.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.