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Finding the Fourth Proportional to 613,866.40, 919,244.40 and 489,450.40

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Solution

The fourth proportional to 613,866.40, 919,244.40 and 489,450.40 is: 732,935.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,866.40 : 919,244.40 = 489,450.40 : x
  2. Step 2: Convert to fraction form
    613,866.40/919,244.40 = 489,450.40/x
  3. Step 3: Cross multiply
    613,866.40x = 919,244.40 × 489,450.40
  4. Step 4: Simplify right side
    613,866.40x = 449,924,539,277.76
  5. Step 5: Solve for x
    x = 449,924,539,277.76/613,866.40
  6. Step 6: Final answer
    x = 732,935.60

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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.