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Finding the Fourth Proportional to 1,277.45, 1,915.07 and 1,059.89

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Solution

The fourth proportional to 1,277.45, 1,915.07 and 1,059.89 is: 1,588.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.45 : 1,915.07 = 1,059.89 : x
  2. Step 2: Convert to fraction form
    1,277.45/1,915.07 = 1,059.89/x
  3. Step 3: Cross multiply
    1,277.45x = 1,915.07 × 1,059.89
  4. Step 4: Simplify right side
    1,277.45x = 2,029,751.65
  5. Step 5: Solve for x
    x = 2,029,751.65/1,277.45
  6. Step 6: Final answer
    x = 1,588.91

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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.