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Finding the Fourth Proportional to 354,352.79, 489,062.94 and 211,195.87

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Solution

The fourth proportional to 354,352.79, 489,062.94 and 211,195.87 is: 291,483.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,352.79 : 489,062.94 = 211,195.87 : x
  2. Step 2: Convert to fraction form
    354,352.79/489,062.94 = 211,195.87/x
  3. Step 3: Cross multiply
    354,352.79x = 489,062.94 × 211,195.87
  4. Step 4: Simplify right side
    354,352.79x = 103,288,073,098.06
  5. Step 5: Solve for x
    x = 103,288,073,098.06/354,352.79
  6. Step 6: Final answer
    x = 291,483.73

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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.