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Finding the Fourth Proportional to 620,575.31, 930,389.38 and 320,864.56

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Solution

The fourth proportional to 620,575.31, 930,389.38 and 320,864.56 is: 481,051.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,575.31 : 930,389.38 = 320,864.56 : x
  2. Step 2: Convert to fraction form
    620,575.31/930,389.38 = 320,864.56/x
  3. Step 3: Cross multiply
    620,575.31x = 930,389.38 × 320,864.56
  4. Step 4: Simplify right side
    620,575.31x = 298,528,979,042.37
  5. Step 5: Solve for x
    x = 298,528,979,042.37/620,575.31
  6. Step 6: Final answer
    x = 481,051.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.