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Finding the Fourth Proportional to 484,990.35, 669,286.86 and 281,159.43

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Solution

The fourth proportional to 484,990.35, 669,286.86 and 281,159.43 is: 388,000.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,990.35 : 669,286.86 = 281,159.43 : x
  2. Step 2: Convert to fraction form
    484,990.35/669,286.86 = 281,159.43/x
  3. Step 3: Cross multiply
    484,990.35x = 669,286.86 × 281,159.43
  4. Step 4: Simplify right side
    484,990.35x = 188,176,312,064.09
  5. Step 5: Solve for x
    x = 188,176,312,064.09/484,990.35
  6. Step 6: Final answer
    x = 388,000.12

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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.