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Finding the Fourth Proportional to 1,802.91, 2,703.68 and 980.05

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Solution

The fourth proportional to 1,802.91, 2,703.68 and 980.05 is: 1,469.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,802.91 : 2,703.68 = 980.05 : x
  2. Step 2: Convert to fraction form
    1,802.91/2,703.68 = 980.05/x
  3. Step 3: Cross multiply
    1,802.91x = 2,703.68 × 980.05
  4. Step 4: Simplify right side
    1,802.91x = 2,649,738.67
  5. Step 5: Solve for x
    x = 2,649,738.67/1,802.91
  6. Step 6: Final answer
    x = 1,469.70

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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.