Home / 1,280.79-1,916.33-1,159.29

Finding the Fourth Proportional to 1,280.79, 1,916.33 and 1,159.29

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Solution

The fourth proportional to 1,280.79, 1,916.33 and 1,159.29 is: 1,734.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.79 : 1,916.33 = 1,159.29 : x
  2. Step 2: Convert to fraction form
    1,280.79/1,916.33 = 1,159.29/x
  3. Step 3: Cross multiply
    1,280.79x = 1,916.33 × 1,159.29
  4. Step 4: Simplify right side
    1,280.79x = 2,221,576.41
  5. Step 5: Solve for x
    x = 2,221,576.41/1,280.79
  6. Step 6: Final answer
    x = 1,734.54

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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.