Home / 780.25-1,076.67-444.15

Finding the Fourth Proportional to 780.25, 1,076.67 and 444.15

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Solution

The fourth proportional to 780.25, 1,076.67 and 444.15 is: 612.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    780.25 : 1,076.67 = 444.15 : x
  2. Step 2: Convert to fraction form
    780.25/1,076.67 = 444.15/x
  3. Step 3: Cross multiply
    780.25x = 1,076.67 × 444.15
  4. Step 4: Simplify right side
    780.25x = 478,202.98
  5. Step 5: Solve for x
    x = 478,202.98/780.25
  6. Step 6: Final answer
    x = 612.88

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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.