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Finding the Fourth Proportional to 393,864.96, 543,530.88 and 215,016.96

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Solution

The fourth proportional to 393,864.96, 543,530.88 and 215,016.96 is: 296,721.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,864.96 : 543,530.88 = 215,016.96 : x
  2. Step 2: Convert to fraction form
    393,864.96/543,530.88 = 215,016.96/x
  3. Step 3: Cross multiply
    393,864.96x = 543,530.88 × 215,016.96
  4. Step 4: Simplify right side
    393,864.96x = 116,868,357,483.73
  5. Step 5: Solve for x
    x = 116,868,357,483.73/393,864.96
  6. Step 6: Final answer
    x = 296,721.90

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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.