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Finding the Fourth Proportional to 821,671.70, 1,231,720.20 and 347,705.06

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Solution

The fourth proportional to 821,671.70, 1,231,720.20 and 347,705.06 is: 521,224.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,671.70 : 1,231,720.20 = 347,705.06 : x
  2. Step 2: Convert to fraction form
    821,671.70/1,231,720.20 = 347,705.06/x
  3. Step 3: Cross multiply
    821,671.70x = 1,231,720.20 × 347,705.06
  4. Step 4: Simplify right side
    821,671.70x = 428,275,346,044.21
  5. Step 5: Solve for x
    x = 428,275,346,044.21/821,671.70
  6. Step 6: Final answer
    x = 521,224.41

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1.5x scale

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.