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Finding the Fourth Proportional to 396,854.84, 547,666.35 and 215,567.12

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Solution

The fourth proportional to 396,854.84, 547,666.35 and 215,567.12 is: 297,486.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,854.84 : 547,666.35 = 215,567.12 : x
  2. Step 2: Convert to fraction form
    396,854.84/547,666.35 = 215,567.12/x
  3. Step 3: Cross multiply
    396,854.84x = 547,666.35 × 215,567.12
  4. Step 4: Simplify right side
    396,854.84x = 118,058,857,790.41
  5. Step 5: Solve for x
    x = 118,058,857,790.41/396,854.84
  6. Step 6: Final answer
    x = 297,486.25

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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.