Home / 1,420.14-2,130.75-1,259.22

Finding the Fourth Proportional to 1,420.14, 2,130.75 and 1,259.22

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Solution

The fourth proportional to 1,420.14, 2,130.75 and 1,259.22 is: 1,889.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.14 : 2,130.75 = 1,259.22 : x
  2. Step 2: Convert to fraction form
    1,420.14/2,130.75 = 1,259.22/x
  3. Step 3: Cross multiply
    1,420.14x = 2,130.75 × 1,259.22
  4. Step 4: Simplify right side
    1,420.14x = 2,683,083.02
  5. Step 5: Solve for x
    x = 2,683,083.02/1,420.14
  6. Step 6: Final answer
    x = 1,889.31

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1.5x scale

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.