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Finding the Fourth Proportional to 479,064.71, 661,109.85 and 261,273.80

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Solution

The fourth proportional to 479,064.71, 661,109.85 and 261,273.80 is: 360,558.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,064.71 : 661,109.85 = 261,273.80 : x
  2. Step 2: Convert to fraction form
    479,064.71/661,109.85 = 261,273.80/x
  3. Step 3: Cross multiply
    479,064.71x = 661,109.85 × 261,273.80
  4. Step 4: Simplify right side
    479,064.71x = 172,730,684,379.71
  5. Step 5: Solve for x
    x = 172,730,684,379.71/479,064.71
  6. Step 6: Final answer
    x = 360,558.15

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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.