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Finding the Fourth Proportional to 400,801.96, 601,208.70 and 130,928.68

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Solution

The fourth proportional to 400,801.96, 601,208.70 and 130,928.68 is: 196,394.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,801.96 : 601,208.70 = 130,928.68 : x
  2. Step 2: Convert to fraction form
    400,801.96/601,208.70 = 130,928.68/x
  3. Step 3: Cross multiply
    400,801.96x = 601,208.70 × 130,928.68
  4. Step 4: Simplify right side
    400,801.96x = 78,715,461,495.52
  5. Step 5: Solve for x
    x = 78,715,461,495.52/400,801.96
  6. Step 6: Final answer
    x = 196,394.90

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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.