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Finding the Fourth Proportional to 316,040.64, 436,428.72 and 203,061.84

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Solution

The fourth proportional to 316,040.64, 436,428.72 and 203,061.84 is: 280,413.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,040.64 : 436,428.72 = 203,061.84 : x
  2. Step 2: Convert to fraction form
    316,040.64/436,428.72 = 203,061.84/x
  3. Step 3: Cross multiply
    316,040.64x = 436,428.72 × 203,061.84
  4. Step 4: Simplify right side
    316,040.64x = 88,622,018,912.04
  5. Step 5: Solve for x
    x = 88,622,018,912.04/316,040.64
  6. Step 6: Final answer
    x = 280,413.36

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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.