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Finding the Fourth Proportional to 457,980.60, 686,960.10 and 125,556.60

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Solution

The fourth proportional to 457,980.60, 686,960.10 and 125,556.60 is: 188,331.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,980.60 : 686,960.10 = 125,556.60 : x
  2. Step 2: Convert to fraction form
    457,980.60/686,960.10 = 125,556.60/x
  3. Step 3: Cross multiply
    457,980.60x = 686,960.10 × 125,556.60
  4. Step 4: Simplify right side
    457,980.60x = 86,252,374,491.66
  5. Step 5: Solve for x
    x = 86,252,374,491.66/457,980.60
  6. Step 6: Final answer
    x = 188,331.94

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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.