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Finding the Fourth Proportional to 1,426.13, 1,968.08 and 836.68

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Solution

The fourth proportional to 1,426.13, 1,968.08 and 836.68 is: 1,154.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.13 : 1,968.08 = 836.68 : x
  2. Step 2: Convert to fraction form
    1,426.13/1,968.08 = 836.68/x
  3. Step 3: Cross multiply
    1,426.13x = 1,968.08 × 836.68
  4. Step 4: Simplify right side
    1,426.13x = 1,646,653.17
  5. Step 5: Solve for x
    x = 1,646,653.17/1,426.13
  6. Step 6: Final answer
    x = 1,154.63

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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.