Home / 1,322.19-1,981.67-455.49

Finding the Fourth Proportional to 1,322.19, 1,981.67 and 455.49

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Solution

The fourth proportional to 1,322.19, 1,981.67 and 455.49 is: 682.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.19 : 1,981.67 = 455.49 : x
  2. Step 2: Convert to fraction form
    1,322.19/1,981.67 = 455.49/x
  3. Step 3: Cross multiply
    1,322.19x = 1,981.67 × 455.49
  4. Step 4: Simplify right side
    1,322.19x = 902,628.59
  5. Step 5: Solve for x
    x = 902,628.59/1,322.19
  6. Step 6: Final answer
    x = 682.68

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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.