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Finding the Fourth Proportional to 341,421.22, 512,187.46 and 128,205.64

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Solution

The fourth proportional to 341,421.22, 512,187.46 and 128,205.64 is: 192,329.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    341,421.22 : 512,187.46 = 128,205.64 : x
  2. Step 2: Convert to fraction form
    341,421.22/512,187.46 = 128,205.64/x
  3. Step 3: Cross multiply
    341,421.22x = 512,187.46 × 128,205.64
  4. Step 4: Simplify right side
    341,421.22x = 65,665,321,109.27
  5. Step 5: Solve for x
    x = 65,665,321,109.27/341,421.22
  6. Step 6: Final answer
    x = 192,329.35

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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.