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Finding the Fourth Proportional to 1,330.38, 1,836.59 and 858.56

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Solution

The fourth proportional to 1,330.38, 1,836.59 and 858.56 is: 1,185.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.38 : 1,836.59 = 858.56 : x
  2. Step 2: Convert to fraction form
    1,330.38/1,836.59 = 858.56/x
  3. Step 3: Cross multiply
    1,330.38x = 1,836.59 × 858.56
  4. Step 4: Simplify right side
    1,330.38x = 1,576,809.23
  5. Step 5: Solve for x
    x = 1,576,809.23/1,330.38
  6. Step 6: Final answer
    x = 1,185.23

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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.