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Finding the Fourth Proportional to 484,729.36, 668,753.40 and 280,668.91

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Solution

The fourth proportional to 484,729.36, 668,753.40 and 280,668.91 is: 387,222.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,729.36 : 668,753.40 = 280,668.91 : x
  2. Step 2: Convert to fraction form
    484,729.36/668,753.40 = 280,668.91/x
  3. Step 3: Cross multiply
    484,729.36x = 668,753.40 × 280,668.91
  4. Step 4: Simplify right side
    484,729.36x = 187,698,287,836.79
  5. Step 5: Solve for x
    x = 187,698,287,836.79/484,729.36
  6. Step 6: Final answer
    x = 387,222.86

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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.