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Finding the Fourth Proportional to 1,276.99, 1,915.25 and 352.32

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Solution

The fourth proportional to 1,276.99, 1,915.25 and 352.32 is: 528.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.99 : 1,915.25 = 352.32 : x
  2. Step 2: Convert to fraction form
    1,276.99/1,915.25 = 352.32/x
  3. Step 3: Cross multiply
    1,276.99x = 1,915.25 × 352.32
  4. Step 4: Simplify right side
    1,276.99x = 674,780.88
  5. Step 5: Solve for x
    x = 674,780.88/1,276.99
  6. Step 6: Final answer
    x = 528.42

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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.