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Finding the Fourth Proportional to 1,322.13, 1,824.62 and 762.70

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Solution

The fourth proportional to 1,322.13, 1,824.62 and 762.70 is: 1,052.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.13 : 1,824.62 = 762.70 : x
  2. Step 2: Convert to fraction form
    1,322.13/1,824.62 = 762.70/x
  3. Step 3: Cross multiply
    1,322.13x = 1,824.62 × 762.70
  4. Step 4: Simplify right side
    1,322.13x = 1,391,637.67
  5. Step 5: Solve for x
    x = 1,391,637.67/1,322.13
  6. Step 6: Final answer
    x = 1,052.57

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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.