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Finding the Fourth Proportional to 1,039.70, 1,440.98 and 1,020.26

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Solution

The fourth proportional to 1,039.70, 1,440.98 and 1,020.26 is: 1,414.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.70 : 1,440.98 = 1,020.26 : x
  2. Step 2: Convert to fraction form
    1,039.70/1,440.98 = 1,020.26/x
  3. Step 3: Cross multiply
    1,039.70x = 1,440.98 × 1,020.26
  4. Step 4: Simplify right side
    1,039.70x = 1,470,161.95
  5. Step 5: Solve for x
    x = 1,470,161.95/1,039.70
  6. Step 6: Final answer
    x = 1,414.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.