Home / 1,321.29-1,822.98-900.90

Finding the Fourth Proportional to 1,321.29, 1,822.98 and 900.90

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Solution

The fourth proportional to 1,321.29, 1,822.98 and 900.90 is: 1,242.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.29 : 1,822.98 = 900.90 : x
  2. Step 2: Convert to fraction form
    1,321.29/1,822.98 = 900.90/x
  3. Step 3: Cross multiply
    1,321.29x = 1,822.98 × 900.90
  4. Step 4: Simplify right side
    1,321.29x = 1,642,322.68
  5. Step 5: Solve for x
    x = 1,642,322.68/1,321.29
  6. Step 6: Final answer
    x = 1,242.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.