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Finding the Fourth Proportional to 555,083.50, 766,015.23 and 300,436.78

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Solution

The fourth proportional to 555,083.50, 766,015.23 and 300,436.78 is: 414,602.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,083.50 : 766,015.23 = 300,436.78 : x
  2. Step 2: Convert to fraction form
    555,083.50/766,015.23 = 300,436.78/x
  3. Step 3: Cross multiply
    555,083.50x = 766,015.23 × 300,436.78
  4. Step 4: Simplify right side
    555,083.50x = 230,139,149,132.16
  5. Step 5: Solve for x
    x = 230,139,149,132.16/555,083.50
  6. Step 6: Final answer
    x = 414,602.76

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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.