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Finding the Fourth Proportional to 348,047.60, 521,380.20 and 207,388.40

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Solution

The fourth proportional to 348,047.60, 521,380.20 and 207,388.40 is: 310,670.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,047.60 : 521,380.20 = 207,388.40 : x
  2. Step 2: Convert to fraction form
    348,047.60/521,380.20 = 207,388.40/x
  3. Step 3: Cross multiply
    348,047.60x = 521,380.20 × 207,388.40
  4. Step 4: Simplify right side
    348,047.60x = 108,128,205,469.68
  5. Step 5: Solve for x
    x = 108,128,205,469.68/348,047.60
  6. Step 6: Final answer
    x = 310,670.74

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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.