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Finding the Fourth Proportional to 396,838.76, 547,643.40 and 215,554.22

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Solution

The fourth proportional to 396,838.76, 547,643.40 and 215,554.22 is: 297,468.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,838.76 : 547,643.40 = 215,554.22 : x
  2. Step 2: Convert to fraction form
    396,838.76/547,643.40 = 215,554.22/x
  3. Step 3: Cross multiply
    396,838.76x = 547,643.40 × 215,554.22
  4. Step 4: Simplify right side
    396,838.76x = 118,046,845,925.15
  5. Step 5: Solve for x
    x = 118,046,845,925.15/396,838.76
  6. Step 6: Final answer
    x = 297,468.03

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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.