Home / 1,457.32-2,185.98-1,287.22

Finding the Fourth Proportional to 1,457.32, 2,185.98 and 1,287.22

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Solution

The fourth proportional to 1,457.32, 2,185.98 and 1,287.22 is: 1,930.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,457.32 : 2,185.98 = 1,287.22 : x
  2. Step 2: Convert to fraction form
    1,457.32/2,185.98 = 1,287.22/x
  3. Step 3: Cross multiply
    1,457.32x = 2,185.98 × 1,287.22
  4. Step 4: Simplify right side
    1,457.32x = 2,813,837.18
  5. Step 5: Solve for x
    x = 2,813,837.18/1,457.32
  6. Step 6: Final answer
    x = 1,930.83

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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.