Home / 396,708.06-547,455.09-215,418.40

Finding the Fourth Proportional to 396,708.06, 547,455.09 and 215,418.40

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Solution

The fourth proportional to 396,708.06, 547,455.09 and 215,418.40 is: 297,276.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,708.06 : 547,455.09 = 215,418.40 : x
  2. Step 2: Convert to fraction form
    396,708.06/547,455.09 = 215,418.40/x
  3. Step 3: Cross multiply
    396,708.06x = 547,455.09 × 215,418.40
  4. Step 4: Simplify right side
    396,708.06x = 117,931,899,559.66
  5. Step 5: Solve for x
    x = 117,931,899,559.66/396,708.06
  6. Step 6: Final answer
    x = 297,276.29

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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.