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Finding the Fourth Proportional to 1,260,787.56, 1,739,826.18 and 687,793.56

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Solution

The fourth proportional to 1,260,787.56, 1,739,826.18 and 687,793.56 is: 949,122.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260,787.56 : 1,739,826.18 = 687,793.56 : x
  2. Step 2: Convert to fraction form
    1,260,787.56/1,739,826.18 = 687,793.56/x
  3. Step 3: Cross multiply
    1,260,787.56x = 1,739,826.18 × 687,793.56
  4. Step 4: Simplify right side
    1,260,787.56x = 1,196,641,242,123.40
  5. Step 5: Solve for x
    x = 1,196,641,242,123.40/1,260,787.56
  6. Step 6: Final answer
    x = 949,122.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.