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Finding the Fourth Proportional to 479,384.96, 661,591.68 and 278,168

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Solution

The fourth proportional to 479,384.96, 661,591.68 and 278,168 is: 383,895.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,384.96 : 661,591.68 = 278,168 : x
  2. Step 2: Convert to fraction form
    479,384.96/661,591.68 = 278,168/x
  3. Step 3: Cross multiply
    479,384.96x = 661,591.68 × 278,168
  4. Step 4: Simplify right side
    479,384.96x = 184,033,634,442.24
  5. Step 5: Solve for x
    x = 184,033,634,442.24/479,384.96
  6. Step 6: Final answer
    x = 383,895.30

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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.