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Finding the Fourth Proportional to 1,339.79, 1,844.70 and 1,216.77

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Solution

The fourth proportional to 1,339.79, 1,844.70 and 1,216.77 is: 1,675.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.79 : 1,844.70 = 1,216.77 : x
  2. Step 2: Convert to fraction form
    1,339.79/1,844.70 = 1,216.77/x
  3. Step 3: Cross multiply
    1,339.79x = 1,844.70 × 1,216.77
  4. Step 4: Simplify right side
    1,339.79x = 2,244,575.62
  5. Step 5: Solve for x
    x = 2,244,575.62/1,339.79
  6. Step 6: Final answer
    x = 1,675.32

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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.