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Finding the Fourth Proportional to 396,627, 547,329.80 and 215,334.80

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Solution

The fourth proportional to 396,627, 547,329.80 and 215,334.80 is: 297,153.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,627 : 547,329.80 = 215,334.80 : x
  2. Step 2: Convert to fraction form
    396,627/547,329.80 = 215,334.80/x
  3. Step 3: Cross multiply
    396,627x = 547,329.80 × 215,334.80
  4. Step 4: Simplify right side
    396,627x = 117,859,153,017.04
  5. Step 5: Solve for x
    x = 117,859,153,017.04/396,627
  6. Step 6: Final answer
    x = 297,153.63

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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.