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Finding the Fourth Proportional to 554,389.25, 765,057.04 and 312,671.31

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Solution

The fourth proportional to 554,389.25, 765,057.04 and 312,671.31 is: 431,486.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,389.25 : 765,057.04 = 312,671.31 : x
  2. Step 2: Convert to fraction form
    554,389.25/765,057.04 = 312,671.31/x
  3. Step 3: Cross multiply
    554,389.25x = 765,057.04 × 312,671.31
  4. Step 4: Simplify right side
    554,389.25x = 239,211,381,532.88
  5. Step 5: Solve for x
    x = 239,211,381,532.88/554,389.25
  6. Step 6: Final answer
    x = 431,486.33

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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.