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Finding the Fourth Proportional to 564,638.31, 779,201.46 and 306,515.12

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Solution

The fourth proportional to 564,638.31, 779,201.46 and 306,515.12 is: 422,991.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    564,638.31 : 779,201.46 = 306,515.12 : x
  2. Step 2: Convert to fraction form
    564,638.31/779,201.46 = 306,515.12/x
  3. Step 3: Cross multiply
    564,638.31x = 779,201.46 × 306,515.12
  4. Step 4: Simplify right side
    564,638.31x = 238,837,025,120.07
  5. Step 5: Solve for x
    x = 238,837,025,120.07/564,638.31
  6. Step 6: Final answer
    x = 422,991.18

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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.