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Finding the Fourth Proportional to 1,036.60, 1,429.85 and 682.43

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Solution

The fourth proportional to 1,036.60, 1,429.85 and 682.43 is: 941.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.60 : 1,429.85 = 682.43 : x
  2. Step 2: Convert to fraction form
    1,036.60/1,429.85 = 682.43/x
  3. Step 3: Cross multiply
    1,036.60x = 1,429.85 × 682.43
  4. Step 4: Simplify right side
    1,036.60x = 975,767.09
  5. Step 5: Solve for x
    x = 975,767.09/1,036.60
  6. Step 6: Final answer
    x = 941.32

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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.