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Finding the Fourth Proportional to 400,910.31, 553,256.45 and 219,628.80

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Solution

The fourth proportional to 400,910.31, 553,256.45 and 219,628.80 is: 303,087.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,910.31 : 553,256.45 = 219,628.80 : x
  2. Step 2: Convert to fraction form
    400,910.31/553,256.45 = 219,628.80/x
  3. Step 3: Cross multiply
    400,910.31x = 553,256.45 × 219,628.80
  4. Step 4: Simplify right side
    400,910.31x = 121,511,050,205.76
  5. Step 5: Solve for x
    x = 121,511,050,205.76/400,910.31
  6. Step 6: Final answer
    x = 303,087.87

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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.