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Finding the Fourth Proportional to 400,901.68, 553,237.32 and 219,617.20

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Solution

The fourth proportional to 400,901.68, 553,237.32 and 219,617.20 is: 303,067.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,901.68 : 553,237.32 = 219,617.20 : x
  2. Step 2: Convert to fraction form
    400,901.68/553,237.32 = 219,617.20/x
  3. Step 3: Cross multiply
    400,901.68x = 553,237.32 × 219,617.20
  4. Step 4: Simplify right side
    400,901.68x = 121,500,431,153.90
  5. Step 5: Solve for x
    x = 121,500,431,153.90/400,901.68
  6. Step 6: Final answer
    x = 303,067.90

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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.