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Finding the Fourth Proportional to 1,916.98, 2,874.76 and 684.07

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Solution

The fourth proportional to 1,916.98, 2,874.76 and 684.07 is: 1,025.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.98 : 2,874.76 = 684.07 : x
  2. Step 2: Convert to fraction form
    1,916.98/2,874.76 = 684.07/x
  3. Step 3: Cross multiply
    1,916.98x = 2,874.76 × 684.07
  4. Step 4: Simplify right side
    1,916.98x = 1,966,537.07
  5. Step 5: Solve for x
    x = 1,966,537.07/1,916.98
  6. Step 6: Final answer
    x = 1,025.85

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1.5x scale

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.