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Finding the Fourth Proportional to 553,265.87, 763,499.39 and 311,551.34

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Solution

The fourth proportional to 553,265.87, 763,499.39 and 311,551.34 is: 429,936.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,265.87 : 763,499.39 = 311,551.34 : x
  2. Step 2: Convert to fraction form
    553,265.87/763,499.39 = 311,551.34/x
  3. Step 3: Cross multiply
    553,265.87x = 763,499.39 × 311,551.34
  4. Step 4: Simplify right side
    553,265.87x = 237,869,252,668.43
  5. Step 5: Solve for x
    x = 237,869,252,668.43/553,265.87
  6. Step 6: Final answer
    x = 429,936.61

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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.