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Finding the Fourth Proportional to 400,843.67, 553,164.40 and 219,558.63

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Solution

The fourth proportional to 400,843.67, 553,164.40 and 219,558.63 is: 302,990.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,843.67 : 553,164.40 = 219,558.63 : x
  2. Step 2: Convert to fraction form
    400,843.67/553,164.40 = 219,558.63/x
  3. Step 3: Cross multiply
    400,843.67x = 553,164.40 × 219,558.63
  4. Step 4: Simplify right side
    400,843.67x = 121,452,017,828.77
  5. Step 5: Solve for x
    x = 121,452,017,828.77/400,843.67
  6. Step 6: Final answer
    x = 302,990.98

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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.