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Finding the Fourth Proportional to 400,620.81, 552,863.25 and 219,329.70

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Solution

The fourth proportional to 400,620.81, 552,863.25 and 219,329.70 is: 302,678.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,620.81 : 552,863.25 = 219,329.70 : x
  2. Step 2: Convert to fraction form
    400,620.81/552,863.25 = 219,329.70/x
  3. Step 3: Cross multiply
    400,620.81x = 552,863.25 × 219,329.70
  4. Step 4: Simplify right side
    400,620.81x = 121,259,330,763.53
  5. Step 5: Solve for x
    x = 121,259,330,763.53/400,620.81
  6. Step 6: Final answer
    x = 302,678.56

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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.