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Finding the Fourth Proportional to 1,400.45, 2,100.59 and 620.22

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Solution

The fourth proportional to 1,400.45, 2,100.59 and 620.22 is: 930.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.45 : 2,100.59 = 620.22 : x
  2. Step 2: Convert to fraction form
    1,400.45/2,100.59 = 620.22/x
  3. Step 3: Cross multiply
    1,400.45x = 2,100.59 × 620.22
  4. Step 4: Simplify right side
    1,400.45x = 1,302,833.18
  5. Step 5: Solve for x
    x = 1,302,833.18/1,400.45
  6. Step 6: Final answer
    x = 930.30

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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.