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Finding the Fourth Proportional to 479,619.72, 661,866.66 and 275,668.20

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Solution

The fourth proportional to 479,619.72, 661,866.66 and 275,668.20 is: 380,417.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,619.72 : 661,866.66 = 275,668.20 : x
  2. Step 2: Convert to fraction form
    479,619.72/661,866.66 = 275,668.20/x
  3. Step 3: Cross multiply
    479,619.72x = 661,866.66 × 275,668.20
  4. Step 4: Simplify right side
    479,619.72x = 182,455,590,802.21
  5. Step 5: Solve for x
    x = 182,455,590,802.21/479,619.72
  6. Step 6: Final answer
    x = 380,417.20

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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.