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Finding the Fourth Proportional to 485,627.70, 668,641.23 and 412,887.54

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Solution

The fourth proportional to 485,627.70, 668,641.23 and 412,887.54 is: 568,488.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,627.70 : 668,641.23 = 412,887.54 : x
  2. Step 2: Convert to fraction form
    485,627.70/668,641.23 = 412,887.54/x
  3. Step 3: Cross multiply
    485,627.70x = 668,641.23 × 412,887.54
  4. Step 4: Simplify right side
    485,627.70x = 276,073,632,597.27
  5. Step 5: Solve for x
    x = 276,073,632,597.27/485,627.70
  6. Step 6: Final answer
    x = 568,488.23

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1.5x scale

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.