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Finding the Fourth Proportional to 554,665.87, 765,373.06 and 312,934.33

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Solution

The fourth proportional to 554,665.87, 765,373.06 and 312,934.33 is: 431,812.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,665.87 : 765,373.06 = 312,934.33 : x
  2. Step 2: Convert to fraction form
    554,665.87/765,373.06 = 312,934.33/x
  3. Step 3: Cross multiply
    554,665.87x = 765,373.06 × 312,934.33
  4. Step 4: Simplify right side
    554,665.87x = 239,511,505,731.15
  5. Step 5: Solve for x
    x = 239,511,505,731.15/554,665.87
  6. Step 6: Final answer
    x = 431,812.23

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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.