Home / 1,427.12-2,140.66-561.44

Finding the Fourth Proportional to 1,427.12, 2,140.66 and 561.44

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Solution

The fourth proportional to 1,427.12, 2,140.66 and 561.44 is: 842.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.12 : 2,140.66 = 561.44 : x
  2. Step 2: Convert to fraction form
    1,427.12/2,140.66 = 561.44/x
  3. Step 3: Cross multiply
    1,427.12x = 2,140.66 × 561.44
  4. Step 4: Simplify right side
    1,427.12x = 1,201,852.15
  5. Step 5: Solve for x
    x = 1,201,852.15/1,427.12
  6. Step 6: Final answer
    x = 842.15

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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.