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Finding the Fourth Proportional to 499.05, 688.60 and 277.99

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Solution

The fourth proportional to 499.05, 688.60 and 277.99 is: 383.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.05 : 688.60 = 277.99 : x
  2. Step 2: Convert to fraction form
    499.05/688.60 = 277.99/x
  3. Step 3: Cross multiply
    499.05x = 688.60 × 277.99
  4. Step 4: Simplify right side
    499.05x = 191,423.91
  5. Step 5: Solve for x
    x = 191,423.91/499.05
  6. Step 6: Final answer
    x = 383.58

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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.