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Finding the Fourth Proportional to 1,216.80, 1,677.36 and 884.70

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Solution

The fourth proportional to 1,216.80, 1,677.36 and 884.70 is: 1,219.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216.80 : 1,677.36 = 884.70 : x
  2. Step 2: Convert to fraction form
    1,216.80/1,677.36 = 884.70/x
  3. Step 3: Cross multiply
    1,216.80x = 1,677.36 × 884.70
  4. Step 4: Simplify right side
    1,216.80x = 1,483,960.39
  5. Step 5: Solve for x
    x = 1,483,960.39/1,216.80
  6. Step 6: Final answer
    x = 1,219.56

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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.