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Finding the Fourth Proportional to 891,534, 1,230,338.52 and 489,126

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Solution

The fourth proportional to 891,534, 1,230,338.52 and 489,126 is: 675,005.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,534 : 1,230,338.52 = 489,126 : x
  2. Step 2: Convert to fraction form
    891,534/1,230,338.52 = 489,126/x
  3. Step 3: Cross multiply
    891,534x = 1,230,338.52 × 489,126
  4. Step 4: Simplify right side
    891,534x = 601,790,558,933.52
  5. Step 5: Solve for x
    x = 601,790,558,933.52/891,534
  6. Step 6: Final answer
    x = 675,005.73

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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.