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Finding the Fourth Proportional to 400,953.64, 553,292.28 and 219,629.56

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Solution

The fourth proportional to 400,953.64, 553,292.28 and 219,629.56 is: 303,075.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,953.64 : 553,292.28 = 219,629.56 : x
  2. Step 2: Convert to fraction form
    400,953.64/553,292.28 = 219,629.56/x
  3. Step 3: Cross multiply
    400,953.64x = 553,292.28 × 219,629.56
  4. Step 4: Simplify right side
    400,953.64x = 121,519,340,007.80
  5. Step 5: Solve for x
    x = 121,519,340,007.80/400,953.64
  6. Step 6: Final answer
    x = 303,075.79

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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.