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Finding the Fourth Proportional to 848.77, 1,170.72 and 779.09

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Solution

The fourth proportional to 848.77, 1,170.72 and 779.09 is: 1,074.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.77 : 1,170.72 = 779.09 : x
  2. Step 2: Convert to fraction form
    848.77/1,170.72 = 779.09/x
  3. Step 3: Cross multiply
    848.77x = 1,170.72 × 779.09
  4. Step 4: Simplify right side
    848.77x = 912,096.24
  5. Step 5: Solve for x
    x = 912,096.24/848.77
  6. Step 6: Final answer
    x = 1,074.61

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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.