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Finding the Fourth Proportional to 552,840, 762,911.12 and 311,103.60

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Solution

The fourth proportional to 552,840, 762,911.12 and 311,103.60 is: 429,318.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    552,840 : 762,911.12 = 311,103.60 : x
  2. Step 2: Convert to fraction form
    552,840/762,911.12 = 311,103.60/x
  3. Step 3: Cross multiply
    552,840x = 762,911.12 × 311,103.60
  4. Step 4: Simplify right side
    552,840x = 237,344,395,912.03
  5. Step 5: Solve for x
    x = 237,344,395,912.03/552,840
  6. Step 6: Final answer
    x = 429,318.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.