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Finding the Fourth Proportional to 308,128.67, 425,178.47 and 180,757.79

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Solution

The fourth proportional to 308,128.67, 425,178.47 and 180,757.79 is: 249,422.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,128.67 : 425,178.47 = 180,757.79 : x
  2. Step 2: Convert to fraction form
    308,128.67/425,178.47 = 180,757.79/x
  3. Step 3: Cross multiply
    308,128.67x = 425,178.47 × 180,757.79
  4. Step 4: Simplify right side
    308,128.67x = 76,854,317,563.10
  5. Step 5: Solve for x
    x = 76,854,317,563.10/308,128.67
  6. Step 6: Final answer
    x = 249,422.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.