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Finding the Fourth Proportional to 678,101.60, 1,018,318.80 and 479,813.60

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Solution

The fourth proportional to 678,101.60, 1,018,318.80 and 479,813.60 is: 720,545.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,101.60 : 1,018,318.80 = 479,813.60 : x
  2. Step 2: Convert to fraction form
    678,101.60/1,018,318.80 = 479,813.60/x
  3. Step 3: Cross multiply
    678,101.60x = 1,018,318.80 × 479,813.60
  4. Step 4: Simplify right side
    678,101.60x = 488,603,209,375.68
  5. Step 5: Solve for x
    x = 488,603,209,375.68/678,101.60
  6. Step 6: Final answer
    x = 720,545.73

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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.