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Finding the Fourth Proportional to 485,488.79, 669,661.85 and 322,141.76

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Solution

The fourth proportional to 485,488.79, 669,661.85 and 322,141.76 is: 444,348.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,488.79 : 669,661.85 = 322,141.76 : x
  2. Step 2: Convert to fraction form
    485,488.79/669,661.85 = 322,141.76/x
  3. Step 3: Cross multiply
    485,488.79x = 669,661.85 × 322,141.76
  4. Step 4: Simplify right side
    485,488.79x = 215,726,042,004.84
  5. Step 5: Solve for x
    x = 215,726,042,004.84/485,488.79
  6. Step 6: Final answer
    x = 444,348.15

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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.