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Finding the Fourth Proportional to 400,964.43, 553,330.62 and 219,687.69

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Solution

The fourth proportional to 400,964.43, 553,330.62 and 219,687.69 is: 303,168.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,964.43 : 553,330.62 = 219,687.69 : x
  2. Step 2: Convert to fraction form
    400,964.43/553,330.62 = 219,687.69/x
  3. Step 3: Cross multiply
    400,964.43x = 553,330.62 × 219,687.69
  4. Step 4: Simplify right side
    400,964.43x = 121,559,925,714.07
  5. Step 5: Solve for x
    x = 121,559,925,714.07/400,964.43
  6. Step 6: Final answer
    x = 303,168.85

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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.