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Finding the Fourth Proportional to 445,556.90, 668,374.65 and 125,711.57

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Solution

The fourth proportional to 445,556.90, 668,374.65 and 125,711.57 is: 188,578.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,556.90 : 668,374.65 = 125,711.57 : x
  2. Step 2: Convert to fraction form
    445,556.90/668,374.65 = 125,711.57/x
  3. Step 3: Cross multiply
    445,556.90x = 668,374.65 × 125,711.57
  4. Step 4: Simplify right side
    445,556.90x = 84,022,425,971.14
  5. Step 5: Solve for x
    x = 84,022,425,971.14/445,556.90
  6. Step 6: Final answer
    x = 188,578.44

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1.5x scale

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.