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Finding the Fourth Proportional to 341,390.80, 512,086.20 and 128,158.30

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Solution

The fourth proportional to 341,390.80, 512,086.20 and 128,158.30 is: 192,237.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    341,390.80 : 512,086.20 = 128,158.30 : x
  2. Step 2: Convert to fraction form
    341,390.80/512,086.20 = 128,158.30/x
  3. Step 3: Cross multiply
    341,390.80x = 512,086.20 × 128,158.30
  4. Step 4: Simplify right side
    341,390.80x = 65,628,096,845.46
  5. Step 5: Solve for x
    x = 65,628,096,845.46/341,390.80
  6. Step 6: Final answer
    x = 192,237.45

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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.