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Finding the Fourth Proportional to 396,419.40, 546,955.20 and 235,310.40

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Solution

The fourth proportional to 396,419.40, 546,955.20 and 235,310.40 is: 324,666.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,419.40 : 546,955.20 = 235,310.40 : x
  2. Step 2: Convert to fraction form
    396,419.40/546,955.20 = 235,310.40/x
  3. Step 3: Cross multiply
    396,419.40x = 546,955.20 × 235,310.40
  4. Step 4: Simplify right side
    396,419.40x = 128,704,246,894.08
  5. Step 5: Solve for x
    x = 128,704,246,894.08/396,419.40
  6. Step 6: Final answer
    x = 324,666.87

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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.