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Finding the Fourth Proportional to 893,145.90, 1,338,163.65 and 768,729.90

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Solution

The fourth proportional to 893,145.90, 1,338,163.65 and 768,729.90 is: 1,151,756.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    893,145.90 : 1,338,163.65 = 768,729.90 : x
  2. Step 2: Convert to fraction form
    893,145.90/1,338,163.65 = 768,729.90/x
  3. Step 3: Cross multiply
    893,145.90x = 1,338,163.65 × 768,729.90
  4. Step 4: Simplify right side
    893,145.90x = 1,028,686,408,848.14
  5. Step 5: Solve for x
    x = 1,028,686,408,848.14/893,145.90
  6. Step 6: Final answer
    x = 1,151,756.29

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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.