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Finding the Fourth Proportional to 341,391.80, 512,087.70 and 215,420.60

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Solution

The fourth proportional to 341,391.80, 512,087.70 and 215,420.60 is: 323,130.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    341,391.80 : 512,087.70 = 215,420.60 : x
  2. Step 2: Convert to fraction form
    341,391.80/512,087.70 = 215,420.60/x
  3. Step 3: Cross multiply
    341,391.80x = 512,087.70 × 215,420.60
  4. Step 4: Simplify right side
    341,391.80x = 110,314,239,586.62
  5. Step 5: Solve for x
    x = 110,314,239,586.62/341,391.80
  6. Step 6: Final answer
    x = 323,130.90

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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.