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Finding the Fourth Proportional to 400,950.55, 553,311.72 and 219,668.90

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Solution

The fourth proportional to 400,950.55, 553,311.72 and 219,668.90 is: 303,143.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,950.55 : 553,311.72 = 219,668.90 : x
  2. Step 2: Convert to fraction form
    400,950.55/553,311.72 = 219,668.90/x
  3. Step 3: Cross multiply
    400,950.55x = 553,311.72 × 219,668.90
  4. Step 4: Simplify right side
    400,950.55x = 121,545,376,889.51
  5. Step 5: Solve for x
    x = 121,545,376,889.51/400,950.55
  6. Step 6: Final answer
    x = 303,143.06

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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.