Home / 1,620.16-2,235.26-990.52

Finding the Fourth Proportional to 1,620.16, 2,235.26 and 990.52

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Solution

The fourth proportional to 1,620.16, 2,235.26 and 990.52 is: 1,366.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.16 : 2,235.26 = 990.52 : x
  2. Step 2: Convert to fraction form
    1,620.16/2,235.26 = 990.52/x
  3. Step 3: Cross multiply
    1,620.16x = 2,235.26 × 990.52
  4. Step 4: Simplify right side
    1,620.16x = 2,214,069.74
  5. Step 5: Solve for x
    x = 2,214,069.74/1,620.16
  6. Step 6: Final answer
    x = 1,366.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.