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Finding the Fourth Proportional to 401,277.43, 553,756.57 and 219,990.86

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Solution

The fourth proportional to 401,277.43, 553,756.57 and 219,990.86 is: 303,583.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,277.43 : 553,756.57 = 219,990.86 : x
  2. Step 2: Convert to fraction form
    401,277.43/553,756.57 = 219,990.86/x
  3. Step 3: Cross multiply
    401,277.43x = 553,756.57 × 219,990.86
  4. Step 4: Simplify right side
    401,277.43x = 121,821,382,822.78
  5. Step 5: Solve for x
    x = 121,821,382,822.78/401,277.43
  6. Step 6: Final answer
    x = 303,583.94

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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.