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Finding the Fourth Proportional to 518,211.55, 775,561.65 and 318,658.33

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Solution

The fourth proportional to 518,211.55, 775,561.65 and 318,658.33 is: 476,907.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,211.55 : 775,561.65 = 318,658.33 : x
  2. Step 2: Convert to fraction form
    518,211.55/775,561.65 = 318,658.33/x
  3. Step 3: Cross multiply
    518,211.55x = 775,561.65 × 318,658.33
  4. Step 4: Simplify right side
    518,211.55x = 247,139,180,201.05
  5. Step 5: Solve for x
    x = 247,139,180,201.05/518,211.55
  6. Step 6: Final answer
    x = 476,907.90

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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.