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Finding the Fourth Proportional to 1,277.89, 1,916.73 and 353.38

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Solution

The fourth proportional to 1,277.89, 1,916.73 and 353.38 is: 530.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.89 : 1,916.73 = 353.38 : x
  2. Step 2: Convert to fraction form
    1,277.89/1,916.73 = 353.38/x
  3. Step 3: Cross multiply
    1,277.89x = 1,916.73 × 353.38
  4. Step 4: Simplify right side
    1,277.89x = 677,332.85
  5. Step 5: Solve for x
    x = 677,332.85/1,277.89
  6. Step 6: Final answer
    x = 530.04

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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.