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Finding the Fourth Proportional to 495,491.67, 683,791.16 and 280,628.55

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Solution

The fourth proportional to 495,491.67, 683,791.16 and 280,628.55 is: 387,274.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,491.67 : 683,791.16 = 280,628.55 : x
  2. Step 2: Convert to fraction form
    495,491.67/683,791.16 = 280,628.55/x
  3. Step 3: Cross multiply
    495,491.67x = 683,791.16 × 280,628.55
  4. Step 4: Simplify right side
    495,491.67x = 191,891,320,330.48
  5. Step 5: Solve for x
    x = 191,891,320,330.48/495,491.67
  6. Step 6: Final answer
    x = 387,274.56

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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.