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Finding the Fourth Proportional to 396,878.68, 547,690.44 and 215,589.34

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Solution

The fourth proportional to 396,878.68, 547,690.44 and 215,589.34 is: 297,512.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,878.68 : 547,690.44 = 215,589.34 : x
  2. Step 2: Convert to fraction form
    396,878.68/547,690.44 = 215,589.34/x
  3. Step 3: Cross multiply
    396,878.68x = 547,690.44 × 215,589.34
  4. Step 4: Simplify right side
    396,878.68x = 118,076,220,483.91
  5. Step 5: Solve for x
    x = 118,076,220,483.91/396,878.68
  6. Step 6: Final answer
    x = 297,512.13

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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.