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Finding the Fourth Proportional to 612,318.78, 918,495.45 and 169,086.78

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Solution

The fourth proportional to 612,318.78, 918,495.45 and 169,086.78 is: 253,634.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,318.78 : 918,495.45 = 169,086.78 : x
  2. Step 2: Convert to fraction form
    612,318.78/918,495.45 = 169,086.78/x
  3. Step 3: Cross multiply
    612,318.78x = 918,495.45 × 169,086.78
  4. Step 4: Simplify right side
    612,318.78x = 155,305,438,085.15
  5. Step 5: Solve for x
    x = 155,305,438,085.15/612,318.78
  6. Step 6: Final answer
    x = 253,634.94

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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.