Home / 1,427.97-2,130.43-1,272.15

Finding the Fourth Proportional to 1,427.97, 2,130.43 and 1,272.15

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Solution

The fourth proportional to 1,427.97, 2,130.43 and 1,272.15 is: 1,897.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,427.97 : 2,130.43 = 1,272.15 : x
  2. Step 2: Convert to fraction form
    1,427.97/2,130.43 = 1,272.15/x
  3. Step 3: Cross multiply
    1,427.97x = 2,130.43 × 1,272.15
  4. Step 4: Simplify right side
    1,427.97x = 2,710,219.05
  5. Step 5: Solve for x
    x = 2,710,219.05/1,427.97
  6. Step 6: Final answer
    x = 1,897.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.