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Finding the Fourth Proportional to 354,366.48, 489,144.24 and 211,171.44

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Solution

The fourth proportional to 354,366.48, 489,144.24 and 211,171.44 is: 291,487.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,366.48 : 489,144.24 = 211,171.44 : x
  2. Step 2: Convert to fraction form
    354,366.48/489,144.24 = 211,171.44/x
  3. Step 3: Cross multiply
    354,366.48x = 489,144.24 × 211,171.44
  4. Step 4: Simplify right side
    354,366.48x = 103,293,293,528.51
  5. Step 5: Solve for x
    x = 103,293,293,528.51/354,366.48
  6. Step 6: Final answer
    x = 291,487.20

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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.