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Finding the Fourth Proportional to 341,994.30, 512,991.45 and 128,761.80

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Solution

The fourth proportional to 341,994.30, 512,991.45 and 128,761.80 is: 193,142.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    341,994.30 : 512,991.45 = 128,761.80 : x
  2. Step 2: Convert to fraction form
    341,994.30/512,991.45 = 128,761.80/x
  3. Step 3: Cross multiply
    341,994.30x = 512,991.45 × 128,761.80
  4. Step 4: Simplify right side
    341,994.30x = 66,053,702,486.61
  5. Step 5: Solve for x
    x = 66,053,702,486.61/341,994.30
  6. Step 6: Final answer
    x = 193,142.70

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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.