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Finding the Fourth Proportional to 1,073.88, 1,481.04 and 778.32

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Solution

The fourth proportional to 1,073.88, 1,481.04 and 778.32 is: 1,073.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,073.88 : 1,481.04 = 778.32 : x
  2. Step 2: Convert to fraction form
    1,073.88/1,481.04 = 778.32/x
  3. Step 3: Cross multiply
    1,073.88x = 1,481.04 × 778.32
  4. Step 4: Simplify right side
    1,073.88x = 1,152,723.05
  5. Step 5: Solve for x
    x = 1,152,723.05/1,073.88
  6. Step 6: Final answer
    x = 1,073.42

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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.