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Finding the Fourth Proportional to 1,916.89, 2,875.94 and 876.85

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Solution

The fourth proportional to 1,916.89, 2,875.94 and 876.85 is: 1,315.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.89 : 2,875.94 = 876.85 : x
  2. Step 2: Convert to fraction form
    1,916.89/2,875.94 = 876.85/x
  3. Step 3: Cross multiply
    1,916.89x = 2,875.94 × 876.85
  4. Step 4: Simplify right side
    1,916.89x = 2,521,767.99
  5. Step 5: Solve for x
    x = 2,521,767.99/1,916.89
  6. Step 6: Final answer
    x = 1,315.55

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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.