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Finding the Fourth Proportional to 2,615.88, 3,923.36 and 766.95

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Solution

The fourth proportional to 2,615.88, 3,923.36 and 766.95 is: 1,150.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,615.88 : 3,923.36 = 766.95 : x
  2. Step 2: Convert to fraction form
    2,615.88/3,923.36 = 766.95/x
  3. Step 3: Cross multiply
    2,615.88x = 3,923.36 × 766.95
  4. Step 4: Simplify right side
    2,615.88x = 3,009,020.95
  5. Step 5: Solve for x
    x = 3,009,020.95/2,615.88
  6. Step 6: Final answer
    x = 1,150.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.