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Finding the Fourth Proportional to 1,223.34, 1,821.86 and 1,216.32

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Solution

The fourth proportional to 1,223.34, 1,821.86 and 1,216.32 is: 1,811.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223.34 : 1,821.86 = 1,216.32 : x
  2. Step 2: Convert to fraction form
    1,223.34/1,821.86 = 1,216.32/x
  3. Step 3: Cross multiply
    1,223.34x = 1,821.86 × 1,216.32
  4. Step 4: Simplify right side
    1,223.34x = 2,215,958.67
  5. Step 5: Solve for x
    x = 2,215,958.67/1,223.34
  6. Step 6: Final answer
    x = 1,811.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.