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Finding the Fourth Proportional to 1,315,481.50, 1,815,364.47 and 711,869.50

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Solution

The fourth proportional to 1,315,481.50, 1,815,364.47 and 711,869.50 is: 982,379.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,481.50 : 1,815,364.47 = 711,869.50 : x
  2. Step 2: Convert to fraction form
    1,315,481.50/1,815,364.47 = 711,869.50/x
  3. Step 3: Cross multiply
    1,315,481.50x = 1,815,364.47 × 711,869.50
  4. Step 4: Simplify right side
    1,315,481.50x = 1,292,302,597,576.67
  5. Step 5: Solve for x
    x = 1,292,302,597,576.67/1,315,481.50
  6. Step 6: Final answer
    x = 982,379.91

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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.