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Finding the Fourth Proportional to 667,315.71, 920,896.54 and 361,392.59

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Solution

The fourth proportional to 667,315.71, 920,896.54 and 361,392.59 is: 498,722.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,315.71 : 920,896.54 = 361,392.59 : x
  2. Step 2: Convert to fraction form
    667,315.71/920,896.54 = 361,392.59/x
  3. Step 3: Cross multiply
    667,315.71x = 920,896.54 × 361,392.59
  4. Step 4: Simplify right side
    667,315.71x = 332,805,187,111.40
  5. Step 5: Solve for x
    x = 332,805,187,111.40/667,315.71
  6. Step 6: Final answer
    x = 498,722.24

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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.