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Finding the Fourth Proportional to 554,677.33, 765,490.82 and 312,871.68

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Solution

The fourth proportional to 554,677.33, 765,490.82 and 312,871.68 is: 431,783.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,677.33 : 765,490.82 = 312,871.68 : x
  2. Step 2: Convert to fraction form
    554,677.33/765,490.82 = 312,871.68/x
  3. Step 3: Cross multiply
    554,677.33x = 765,490.82 × 312,871.68
  4. Step 4: Simplify right side
    554,677.33x = 239,500,395,050.52
  5. Step 5: Solve for x
    x = 239,500,395,050.52/554,677.33
  6. Step 6: Final answer
    x = 431,783.28

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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.