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Finding the Fourth Proportional to 779.96, 1,076.38 and 448.36

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Solution

The fourth proportional to 779.96, 1,076.38 and 448.36 is: 618.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.96 : 1,076.38 = 448.36 : x
  2. Step 2: Convert to fraction form
    779.96/1,076.38 = 448.36/x
  3. Step 3: Cross multiply
    779.96x = 1,076.38 × 448.36
  4. Step 4: Simplify right side
    779.96x = 482,605.74
  5. Step 5: Solve for x
    x = 482,605.74/779.96
  6. Step 6: Final answer
    x = 618.76

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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.