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Finding the Fourth Proportional to 894.72, 1,236.24 and 778.08

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Solution

The fourth proportional to 894.72, 1,236.24 and 778.08 is: 1,075.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.72 : 1,236.24 = 778.08 : x
  2. Step 2: Convert to fraction form
    894.72/1,236.24 = 778.08/x
  3. Step 3: Cross multiply
    894.72x = 1,236.24 × 778.08
  4. Step 4: Simplify right side
    894.72x = 961,893.62
  5. Step 5: Solve for x
    x = 961,893.62/894.72
  6. Step 6: Final answer
    x = 1,075.08

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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.