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Finding the Fourth Proportional to 2,642.36, 3,963.58 and 999.68

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Solution

The fourth proportional to 2,642.36, 3,963.58 and 999.68 is: 1,499.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,642.36 : 3,963.58 = 999.68 : x
  2. Step 2: Convert to fraction form
    2,642.36/3,963.58 = 999.68/x
  3. Step 3: Cross multiply
    2,642.36x = 3,963.58 × 999.68
  4. Step 4: Simplify right side
    2,642.36x = 3,962,289.34
  5. Step 5: Solve for x
    x = 3,962,289.34/2,642.36
  6. Step 6: Final answer
    x = 1,499.53

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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.