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Finding the Fourth Proportional to 1,278.33, 1,764.23 and 836.48

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Solution

The fourth proportional to 1,278.33, 1,764.23 and 836.48 is: 1,154.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.33 : 1,764.23 = 836.48 : x
  2. Step 2: Convert to fraction form
    1,278.33/1,764.23 = 836.48/x
  3. Step 3: Cross multiply
    1,278.33x = 1,764.23 × 836.48
  4. Step 4: Simplify right side
    1,278.33x = 1,475,730.11
  5. Step 5: Solve for x
    x = 1,475,730.11/1,278.33
  6. Step 6: Final answer
    x = 1,154.42

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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.