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Finding the Fourth Proportional to 396,502.74, 547,159.12 and 215,210.77

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Solution

The fourth proportional to 396,502.74, 547,159.12 and 215,210.77 is: 296,982.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,502.74 : 547,159.12 = 215,210.77 : x
  2. Step 2: Convert to fraction form
    396,502.74/547,159.12 = 215,210.77/x
  3. Step 3: Cross multiply
    396,502.74x = 547,159.12 × 215,210.77
  4. Step 4: Simplify right side
    396,502.74x = 117,754,533,621.80
  5. Step 5: Solve for x
    x = 117,754,533,621.80/396,502.74
  6. Step 6: Final answer
    x = 296,982.90

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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.