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Finding the Fourth Proportional to 1,328.31, 1,832.97 and 830.82

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Solution

The fourth proportional to 1,328.31, 1,832.97 and 830.82 is: 1,146.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.31 : 1,832.97 = 830.82 : x
  2. Step 2: Convert to fraction form
    1,328.31/1,832.97 = 830.82/x
  3. Step 3: Cross multiply
    1,328.31x = 1,832.97 × 830.82
  4. Step 4: Simplify right side
    1,328.31x = 1,522,868.14
  5. Step 5: Solve for x
    x = 1,522,868.14/1,328.31
  6. Step 6: Final answer
    x = 1,146.47

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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.