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Finding the Fourth Proportional to 1,284.94, 1,773.66 and 813.16

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Solution

The fourth proportional to 1,284.94, 1,773.66 and 813.16 is: 1,122.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.94 : 1,773.66 = 813.16 : x
  2. Step 2: Convert to fraction form
    1,284.94/1,773.66 = 813.16/x
  3. Step 3: Cross multiply
    1,284.94x = 1,773.66 × 813.16
  4. Step 4: Simplify right side
    1,284.94x = 1,442,269.37
  5. Step 5: Solve for x
    x = 1,442,269.37/1,284.94
  6. Step 6: Final answer
    x = 1,122.44

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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.