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Finding the Fourth Proportional to 554,970.31, 765,859.02 and 300,321.50

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Solution

The fourth proportional to 554,970.31, 765,859.02 and 300,321.50 is: 414,443.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,970.31 : 765,859.02 = 300,321.50 : x
  2. Step 2: Convert to fraction form
    554,970.31/765,859.02 = 300,321.50/x
  3. Step 3: Cross multiply
    554,970.31x = 765,859.02 × 300,321.50
  4. Step 4: Simplify right side
    554,970.31x = 230,003,926,408.74
  5. Step 5: Solve for x
    x = 230,003,926,408.74/554,970.31
  6. Step 6: Final answer
    x = 414,443.66

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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.