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Finding the Fourth Proportional to 617,930.40, 926,895.60 and 219,021.60

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Solution

The fourth proportional to 617,930.40, 926,895.60 and 219,021.60 is: 328,532.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,930.40 : 926,895.60 = 219,021.60 : x
  2. Step 2: Convert to fraction form
    617,930.40/926,895.60 = 219,021.60/x
  3. Step 3: Cross multiply
    617,930.40x = 926,895.60 × 219,021.60
  4. Step 4: Simplify right side
    617,930.40x = 203,010,157,344.96
  5. Step 5: Solve for x
    x = 203,010,157,344.96/617,930.40
  6. Step 6: Final answer
    x = 328,532.40

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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.