Home / 1,422.36-2,130.81-804.23

Finding the Fourth Proportional to 1,422.36, 2,130.81 and 804.23

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Solution

The fourth proportional to 1,422.36, 2,130.81 and 804.23 is: 1,204.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.36 : 2,130.81 = 804.23 : x
  2. Step 2: Convert to fraction form
    1,422.36/2,130.81 = 804.23/x
  3. Step 3: Cross multiply
    1,422.36x = 2,130.81 × 804.23
  4. Step 4: Simplify right side
    1,422.36x = 1,713,655.65
  5. Step 5: Solve for x
    x = 1,713,655.65/1,422.36
  6. Step 6: Final answer
    x = 1,204.80

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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.