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Finding the Fourth Proportional to 1,963.50, 2,709.76 and 1,135.50

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Solution

The fourth proportional to 1,963.50, 2,709.76 and 1,135.50 is: 1,567.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,963.50 : 2,709.76 = 1,135.50 : x
  2. Step 2: Convert to fraction form
    1,963.50/2,709.76 = 1,135.50/x
  3. Step 3: Cross multiply
    1,963.50x = 2,709.76 × 1,135.50
  4. Step 4: Simplify right side
    1,963.50x = 3,076,932.48
  5. Step 5: Solve for x
    x = 3,076,932.48/1,963.50
  6. Step 6: Final answer
    x = 1,567.07

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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.