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Finding the Fourth Proportional to 396,794.78, 547,580.75 and 215,510.25

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Solution

The fourth proportional to 396,794.78, 547,580.75 and 215,510.25 is: 297,406.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,794.78 : 547,580.75 = 215,510.25 : x
  2. Step 2: Convert to fraction form
    396,794.78/547,580.75 = 215,510.25/x
  3. Step 3: Cross multiply
    396,794.78x = 547,580.75 × 215,510.25
  4. Step 4: Simplify right side
    396,794.78x = 118,009,264,327.69
  5. Step 5: Solve for x
    x = 118,009,264,327.69/396,794.78
  6. Step 6: Final answer
    x = 297,406.29

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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.