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Finding the Fourth Proportional to 848.80, 1,278.99 and 698.11

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Solution

The fourth proportional to 848.80, 1,278.99 and 698.11 is: 1,051.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.80 : 1,278.99 = 698.11 : x
  2. Step 2: Convert to fraction form
    848.80/1,278.99 = 698.11/x
  3. Step 3: Cross multiply
    848.80x = 1,278.99 × 698.11
  4. Step 4: Simplify right side
    848.80x = 892,865.82
  5. Step 5: Solve for x
    x = 892,865.82/848.80
  6. Step 6: Final answer
    x = 1,051.92

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.