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Finding the Fourth Proportional to 396,406.84, 547,041.79 and 215,118.77

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Solution

The fourth proportional to 396,406.84, 547,041.79 and 215,118.77 is: 296,864.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,406.84 : 547,041.79 = 215,118.77 : x
  2. Step 2: Convert to fraction form
    396,406.84/547,041.79 = 215,118.77/x
  3. Step 3: Cross multiply
    396,406.84x = 547,041.79 × 215,118.77
  4. Step 4: Simplify right side
    396,406.84x = 117,678,953,192.60
  5. Step 5: Solve for x
    x = 117,678,953,192.60/396,406.84
  6. Step 6: Final answer
    x = 296,864.09

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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.