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Finding the Fourth Proportional to 893,138.40, 1,338,152.40 and 768,722.40

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Solution

The fourth proportional to 893,138.40, 1,338,152.40 and 768,722.40 is: 1,151,745.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    893,138.40 : 1,338,152.40 = 768,722.40 : x
  2. Step 2: Convert to fraction form
    893,138.40/1,338,152.40 = 768,722.40/x
  3. Step 3: Cross multiply
    893,138.40x = 1,338,152.40 × 768,722.40
  4. Step 4: Simplify right side
    893,138.40x = 1,028,667,724,493.76
  5. Step 5: Solve for x
    x = 1,028,667,724,493.76/893,138.40
  6. Step 6: Final answer
    x = 1,151,745.04

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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.