Home / 1,605.18-2,215.44-942.21

Finding the Fourth Proportional to 1,605.18, 2,215.44 and 942.21

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Solution

The fourth proportional to 1,605.18, 2,215.44 and 942.21 is: 1,300.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.18 : 2,215.44 = 942.21 : x
  2. Step 2: Convert to fraction form
    1,605.18/2,215.44 = 942.21/x
  3. Step 3: Cross multiply
    1,605.18x = 2,215.44 × 942.21
  4. Step 4: Simplify right side
    1,605.18x = 2,087,409.72
  5. Step 5: Solve for x
    x = 2,087,409.72/1,605.18
  6. Step 6: Final answer
    x = 1,300.42

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1.5x scale

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.