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Finding the Fourth Proportional to 479,448.13, 661,654.28 and 261,668.69

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Solution

The fourth proportional to 479,448.13, 661,654.28 and 261,668.69 is: 361,111.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,448.13 : 661,654.28 = 261,668.69 : x
  2. Step 2: Convert to fraction form
    479,448.13/661,654.28 = 261,668.69/x
  3. Step 3: Cross multiply
    479,448.13x = 661,654.28 × 261,668.69
  4. Step 4: Simplify right side
    479,448.13x = 173,134,208,680.49
  5. Step 5: Solve for x
    x = 173,134,208,680.49/479,448.13
  6. Step 6: Final answer
    x = 361,111.45

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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.