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Finding the Fourth Proportional to 341,443.80, 512,165.70 and 128,211.30

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Solution

The fourth proportional to 341,443.80, 512,165.70 and 128,211.30 is: 192,316.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    341,443.80 : 512,165.70 = 128,211.30 : x
  2. Step 2: Convert to fraction form
    341,443.80/512,165.70 = 128,211.30/x
  3. Step 3: Cross multiply
    341,443.80x = 512,165.70 × 128,211.30
  4. Step 4: Simplify right side
    341,443.80x = 65,665,430,212.41
  5. Step 5: Solve for x
    x = 65,665,430,212.41/341,443.80
  6. Step 6: Final answer
    x = 192,316.95

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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.