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Finding the Fourth Proportional to 554,781.25, 765,604.39 and 313,066.72

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Solution

The fourth proportional to 554,781.25, 765,604.39 and 313,066.72 is: 432,035.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,781.25 : 765,604.39 = 313,066.72 : x
  2. Step 2: Convert to fraction form
    554,781.25/765,604.39 = 313,066.72/x
  3. Step 3: Cross multiply
    554,781.25x = 765,604.39 × 313,066.72
  4. Step 4: Simplify right side
    554,781.25x = 239,685,251,366.88
  5. Step 5: Solve for x
    x = 239,685,251,366.88/554,781.25
  6. Step 6: Final answer
    x = 432,035.61

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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.