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Finding the Fourth Proportional to 1,322.20, 1,824.62 and 762.63

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Solution

The fourth proportional to 1,322.20, 1,824.62 and 762.63 is: 1,052.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.20 : 1,824.62 = 762.63 : x
  2. Step 2: Convert to fraction form
    1,322.20/1,824.62 = 762.63/x
  3. Step 3: Cross multiply
    1,322.20x = 1,824.62 × 762.63
  4. Step 4: Simplify right side
    1,322.20x = 1,391,503.48
  5. Step 5: Solve for x
    x = 1,391,503.48/1,322.20
  6. Step 6: Final answer
    x = 1,052.41

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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.