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Finding the Fourth Proportional to 479,558.09, 661,806.23 and 261,779.69

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Solution

The fourth proportional to 479,558.09, 661,806.23 and 261,779.69 is: 361,264.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,558.09 : 661,806.23 = 261,779.69 : x
  2. Step 2: Convert to fraction form
    479,558.09/661,806.23 = 261,779.69/x
  3. Step 3: Cross multiply
    479,558.09x = 661,806.23 × 261,779.69
  4. Step 4: Simplify right side
    479,558.09x = 173,247,430,075.09
  5. Step 5: Solve for x
    x = 173,247,430,075.09/479,558.09
  6. Step 6: Final answer
    x = 361,264.74

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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.