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Finding the Fourth Proportional to 399,039.32, 550,624.65 and 253,861.76

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Solution

The fourth proportional to 399,039.32, 550,624.65 and 253,861.76 is: 350,297.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,039.32 : 550,624.65 = 253,861.76 : x
  2. Step 2: Convert to fraction form
    399,039.32/550,624.65 = 253,861.76/x
  3. Step 3: Cross multiply
    399,039.32x = 550,624.65 × 253,861.76
  4. Step 4: Simplify right side
    399,039.32x = 139,782,542,748.38
  5. Step 5: Solve for x
    x = 139,782,542,748.38/399,039.32
  6. Step 6: Final answer
    x = 350,297.67

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1.5x scale

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.