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Finding the Fourth Proportional to 354,363.48, 489,140.10 and 211,168.44

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Solution

The fourth proportional to 354,363.48, 489,140.10 and 211,168.44 is: 291,483.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,363.48 : 489,140.10 = 211,168.44 : x
  2. Step 2: Convert to fraction form
    354,363.48/489,140.10 = 211,168.44/x
  3. Step 3: Cross multiply
    354,363.48x = 489,140.10 × 211,168.44
  4. Step 4: Simplify right side
    354,363.48x = 103,290,951,858.44
  5. Step 5: Solve for x
    x = 103,290,951,858.44/354,363.48
  6. Step 6: Final answer
    x = 291,483.06

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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.