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Finding the Fourth Proportional to 554,815.91, 765,686.42 and 313,119.61

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Solution

The fourth proportional to 554,815.91, 765,686.42 and 313,119.61 is: 432,127.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,815.91 : 765,686.42 = 313,119.61 : x
  2. Step 2: Convert to fraction form
    554,815.91/765,686.42 = 313,119.61/x
  3. Step 3: Cross multiply
    554,815.91x = 765,686.42 × 313,119.61
  4. Step 4: Simplify right side
    554,815.91x = 239,751,430,907.08
  5. Step 5: Solve for x
    x = 239,751,430,907.08/554,815.91
  6. Step 6: Final answer
    x = 432,127.89

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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.