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Finding the Fourth Proportional to 620,517.18, 930,664.78 and 165,110.88

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Solution

The fourth proportional to 620,517.18, 930,664.78 and 165,110.88 is: 247,636.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,517.18 : 930,664.78 = 165,110.88 : x
  2. Step 2: Convert to fraction form
    620,517.18/930,664.78 = 165,110.88/x
  3. Step 3: Cross multiply
    620,517.18x = 930,664.78 × 165,110.88
  4. Step 4: Simplify right side
    620,517.18x = 153,662,880,810.81
  5. Step 5: Solve for x
    x = 153,662,880,810.81/620,517.18
  6. Step 6: Final answer
    x = 247,636.79

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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.