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Finding the Fourth Proportional to 1,318.40, 1,818.82 and 794.13

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Solution

The fourth proportional to 1,318.40, 1,818.82 and 794.13 is: 1,095.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.40 : 1,818.82 = 794.13 : x
  2. Step 2: Convert to fraction form
    1,318.40/1,818.82 = 794.13/x
  3. Step 3: Cross multiply
    1,318.40x = 1,818.82 × 794.13
  4. Step 4: Simplify right side
    1,318.40x = 1,444,379.53
  5. Step 5: Solve for x
    x = 1,444,379.53/1,318.40
  6. Step 6: Final answer
    x = 1,095.55

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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.