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Finding the Fourth Proportional to 520,131.87, 717,776.36 and 287,557.81

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Solution

The fourth proportional to 520,131.87, 717,776.36 and 287,557.81 is: 396,826.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,131.87 : 717,776.36 = 287,557.81 : x
  2. Step 2: Convert to fraction form
    520,131.87/717,776.36 = 287,557.81/x
  3. Step 3: Cross multiply
    520,131.87x = 717,776.36 × 287,557.81
  4. Step 4: Simplify right side
    520,131.87x = 206,402,198,151.37
  5. Step 5: Solve for x
    x = 206,402,198,151.37/520,131.87
  6. Step 6: Final answer
    x = 396,826.67

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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.