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Finding the Fourth Proportional to 1,322.49, 1,984.55 and 775.74

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Solution

The fourth proportional to 1,322.49, 1,984.55 and 775.74 is: 1,164.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.49 : 1,984.55 = 775.74 : x
  2. Step 2: Convert to fraction form
    1,322.49/1,984.55 = 775.74/x
  3. Step 3: Cross multiply
    1,322.49x = 1,984.55 × 775.74
  4. Step 4: Simplify right side
    1,322.49x = 1,539,494.82
  5. Step 5: Solve for x
    x = 1,539,494.82/1,322.49
  6. Step 6: Final answer
    x = 1,164.09

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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.