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Finding the Fourth Proportional to 1,340.36, 2,010.52 and 646.56

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Solution

The fourth proportional to 1,340.36, 2,010.52 and 646.56 is: 969.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.36 : 2,010.52 = 646.56 : x
  2. Step 2: Convert to fraction form
    1,340.36/2,010.52 = 646.56/x
  3. Step 3: Cross multiply
    1,340.36x = 2,010.52 × 646.56
  4. Step 4: Simplify right side
    1,340.36x = 1,299,921.81
  5. Step 5: Solve for x
    x = 1,299,921.81/1,340.36
  6. Step 6: Final answer
    x = 969.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.