Home / 1,420.12-2,127.43-801.93

Finding the Fourth Proportional to 1,420.12, 2,127.43 and 801.93

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Solution

The fourth proportional to 1,420.12, 2,127.43 and 801.93 is: 1,201.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.12 : 2,127.43 = 801.93 : x
  2. Step 2: Convert to fraction form
    1,420.12/2,127.43 = 801.93/x
  3. Step 3: Cross multiply
    1,420.12x = 2,127.43 × 801.93
  4. Step 4: Simplify right side
    1,420.12x = 1,706,049.94
  5. Step 5: Solve for x
    x = 1,706,049.94/1,420.12
  6. Step 6: Final answer
    x = 1,201.34

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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.