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Finding the Fourth Proportional to 1,009.80, 1,391.58 and 832.14

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Solution

The fourth proportional to 1,009.80, 1,391.58 and 832.14 is: 1,146.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,009.80 : 1,391.58 = 832.14 : x
  2. Step 2: Convert to fraction form
    1,009.80/1,391.58 = 832.14/x
  3. Step 3: Cross multiply
    1,009.80x = 1,391.58 × 832.14
  4. Step 4: Simplify right side
    1,009.80x = 1,157,989.38
  5. Step 5: Solve for x
    x = 1,157,989.38/1,009.80
  6. Step 6: Final answer
    x = 1,146.75

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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.