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Finding the Fourth Proportional to 1,435.26, 1,981.49 and 963.84

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Solution

The fourth proportional to 1,435.26, 1,981.49 and 963.84 is: 1,330.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,435.26 : 1,981.49 = 963.84 : x
  2. Step 2: Convert to fraction form
    1,435.26/1,981.49 = 963.84/x
  3. Step 3: Cross multiply
    1,435.26x = 1,981.49 × 963.84
  4. Step 4: Simplify right side
    1,435.26x = 1,909,834.50
  5. Step 5: Solve for x
    x = 1,909,834.50/1,435.26
  6. Step 6: Final answer
    x = 1,330.65

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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.