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Finding the Fourth Proportional to 545,890.78, 818,836.17 and 213,233.50

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Solution

The fourth proportional to 545,890.78, 818,836.17 and 213,233.50 is: 319,850.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,890.78 : 818,836.17 = 213,233.50 : x
  2. Step 2: Convert to fraction form
    545,890.78/818,836.17 = 213,233.50/x
  3. Step 3: Cross multiply
    545,890.78x = 818,836.17 × 213,233.50
  4. Step 4: Simplify right side
    545,890.78x = 174,603,302,455.70
  5. Step 5: Solve for x
    x = 174,603,302,455.70/545,890.78
  6. Step 6: Final answer
    x = 319,850.25

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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.