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Finding the Fourth Proportional to 663,379.76, 915,453.92 and 372,991.58

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Solution

The fourth proportional to 663,379.76, 915,453.92 and 372,991.58 is: 514,722.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,379.76 : 915,453.92 = 372,991.58 : x
  2. Step 2: Convert to fraction form
    663,379.76/915,453.92 = 372,991.58/x
  3. Step 3: Cross multiply
    663,379.76x = 915,453.92 × 372,991.58
  4. Step 4: Simplify right side
    663,379.76x = 341,456,597,595.77
  5. Step 5: Solve for x
    x = 341,456,597,595.77/663,379.76
  6. Step 6: Final answer
    x = 514,722.67

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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.