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Finding the Fourth Proportional to 308,128.78, 425,178.64 and 180,757.90

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Solution

The fourth proportional to 308,128.78, 425,178.64 and 180,757.90 is: 249,422.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,128.78 : 425,178.64 = 180,757.90 : x
  2. Step 2: Convert to fraction form
    308,128.78/425,178.64 = 180,757.90/x
  3. Step 3: Cross multiply
    308,128.78x = 425,178.64 × 180,757.90
  4. Step 4: Simplify right side
    308,128.78x = 76,854,398,091.26
  5. Step 5: Solve for x
    x = 76,854,398,091.26/308,128.78
  6. Step 6: Final answer
    x = 249,422.98

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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.