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Finding the Fourth Proportional to 878,859.75, 1,212,955.89 and 556,599.81

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Solution

The fourth proportional to 878,859.75, 1,212,955.89 and 556,599.81 is: 768,189.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,859.75 : 1,212,955.89 = 556,599.81 : x
  2. Step 2: Convert to fraction form
    878,859.75/1,212,955.89 = 556,599.81/x
  3. Step 3: Cross multiply
    878,859.75x = 1,212,955.89 × 556,599.81
  4. Step 4: Simplify right side
    878,859.75x = 675,131,017,912.38
  5. Step 5: Solve for x
    x = 675,131,017,912.38/878,859.75
  6. Step 6: Final answer
    x = 768,189.71

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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.