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Finding the Fourth Proportional to 1,425.28, 1,966.44 and 835.84

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Solution

The fourth proportional to 1,425.28, 1,966.44 and 835.84 is: 1,153.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.28 : 1,966.44 = 835.84 : x
  2. Step 2: Convert to fraction form
    1,425.28/1,966.44 = 835.84/x
  3. Step 3: Cross multiply
    1,425.28x = 1,966.44 × 835.84
  4. Step 4: Simplify right side
    1,425.28x = 1,643,629.21
  5. Step 5: Solve for x
    x = 1,643,629.21/1,425.28
  6. Step 6: Final answer
    x = 1,153.20

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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.