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Finding the Fourth Proportional to 555,379.09, 766,479.73 and 400,457.82

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Solution

The fourth proportional to 555,379.09, 766,479.73 and 400,457.82 is: 552,672.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,379.09 : 766,479.73 = 400,457.82 : x
  2. Step 2: Convert to fraction form
    555,379.09/766,479.73 = 400,457.82/x
  3. Step 3: Cross multiply
    555,379.09x = 766,479.73 × 400,457.82
  4. Step 4: Simplify right side
    555,379.09x = 306,942,801,749.99
  5. Step 5: Solve for x
    x = 306,942,801,749.99/555,379.09
  6. Step 6: Final answer
    x = 552,672.59

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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.