Home / 1,427.21-2,139.52-549.15

Finding the Fourth Proportional to 1,427.21, 2,139.52 and 549.15

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Solution

The fourth proportional to 1,427.21, 2,139.52 and 549.15 is: 823.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.21 : 2,139.52 = 549.15 : x
  2. Step 2: Convert to fraction form
    1,427.21/2,139.52 = 549.15/x
  3. Step 3: Cross multiply
    1,427.21x = 2,139.52 × 549.15
  4. Step 4: Simplify right side
    1,427.21x = 1,174,918.76
  5. Step 5: Solve for x
    x = 1,174,918.76/1,427.21
  6. Step 6: Final answer
    x = 823.23

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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.