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Finding the Fourth Proportional to 1,330.23, 1,835.92 and 770.68

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Solution

The fourth proportional to 1,330.23, 1,835.92 and 770.68 is: 1,063.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.23 : 1,835.92 = 770.68 : x
  2. Step 2: Convert to fraction form
    1,330.23/1,835.92 = 770.68/x
  3. Step 3: Cross multiply
    1,330.23x = 1,835.92 × 770.68
  4. Step 4: Simplify right side
    1,330.23x = 1,414,906.83
  5. Step 5: Solve for x
    x = 1,414,906.83/1,330.23
  6. Step 6: Final answer
    x = 1,063.66

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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.