Home / 780.03-1,076.44-425.95

Finding the Fourth Proportional to 780.03, 1,076.44 and 425.95

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Solution

The fourth proportional to 780.03, 1,076.44 and 425.95 is: 587.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    780.03 : 1,076.44 = 425.95 : x
  2. Step 2: Convert to fraction form
    780.03/1,076.44 = 425.95/x
  3. Step 3: Cross multiply
    780.03x = 1,076.44 × 425.95
  4. Step 4: Simplify right side
    780.03x = 458,509.90
  5. Step 5: Solve for x
    x = 458,509.90/780.03
  6. Step 6: Final answer
    x = 587.81

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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.