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Finding the Fourth Proportional to 545,830.60, 818,745.90 and 405,862.60

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Solution

The fourth proportional to 545,830.60, 818,745.90 and 405,862.60 is: 608,793.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,830.60 : 818,745.90 = 405,862.60 : x
  2. Step 2: Convert to fraction form
    545,830.60/818,745.90 = 405,862.60/x
  3. Step 3: Cross multiply
    545,830.60x = 818,745.90 × 405,862.60
  4. Step 4: Simplify right side
    545,830.60x = 332,298,339,713.34
  5. Step 5: Solve for x
    x = 332,298,339,713.34/545,830.60
  6. Step 6: Final answer
    x = 608,793.90

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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.