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Finding the Fourth Proportional to 448,861.64, 619,428.81 and 287,716.57

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Solution

The fourth proportional to 448,861.64, 619,428.81 and 287,716.57 is: 397,048.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,861.64 : 619,428.81 = 287,716.57 : x
  2. Step 2: Convert to fraction form
    448,861.64/619,428.81 = 287,716.57/x
  3. Step 3: Cross multiply
    448,861.64x = 619,428.81 × 287,716.57
  4. Step 4: Simplify right side
    448,861.64x = 178,219,932,572.38
  5. Step 5: Solve for x
    x = 178,219,932,572.38/448,861.64
  6. Step 6: Final answer
    x = 397,048.70

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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.