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Finding the Fourth Proportional to 617,140.80, 927,266.40 and 392,608.80

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Solution

The fourth proportional to 617,140.80, 927,266.40 and 392,608.80 is: 589,902.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,140.80 : 927,266.40 = 392,608.80 : x
  2. Step 2: Convert to fraction form
    617,140.80/927,266.40 = 392,608.80/x
  3. Step 3: Cross multiply
    617,140.80x = 927,266.40 × 392,608.80
  4. Step 4: Simplify right side
    617,140.80x = 364,052,948,584.32
  5. Step 5: Solve for x
    x = 364,052,948,584.32/617,140.80
  6. Step 6: Final answer
    x = 589,902.58

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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.