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Finding the Fourth Proportional to 1,857.96, 2,787.05 and 818.45

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Solution

The fourth proportional to 1,857.96, 2,787.05 and 818.45 is: 1,227.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,857.96 : 2,787.05 = 818.45 : x
  2. Step 2: Convert to fraction form
    1,857.96/2,787.05 = 818.45/x
  3. Step 3: Cross multiply
    1,857.96x = 2,787.05 × 818.45
  4. Step 4: Simplify right side
    1,857.96x = 2,281,070.09
  5. Step 5: Solve for x
    x = 2,281,070.09/1,857.96
  6. Step 6: Final answer
    x = 1,227.73

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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.