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Finding the Fourth Proportional to 1,885.61, 2,826.78 and 912.39

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Solution

The fourth proportional to 1,885.61, 2,826.78 and 912.39 is: 1,367.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,885.61 : 2,826.78 = 912.39 : x
  2. Step 2: Convert to fraction form
    1,885.61/2,826.78 = 912.39/x
  3. Step 3: Cross multiply
    1,885.61x = 2,826.78 × 912.39
  4. Step 4: Simplify right side
    1,885.61x = 2,579,125.80
  5. Step 5: Solve for x
    x = 2,579,125.80/1,885.61
  6. Step 6: Final answer
    x = 1,367.80

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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.