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Finding the Fourth Proportional to 499.73, 689.64 and 275.65

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Solution

The fourth proportional to 499.73, 689.64 and 275.65 is: 380.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.73 : 689.64 = 275.65 : x
  2. Step 2: Convert to fraction form
    499.73/689.64 = 275.65/x
  3. Step 3: Cross multiply
    499.73x = 689.64 × 275.65
  4. Step 4: Simplify right side
    499.73x = 190,096.51
  5. Step 5: Solve for x
    x = 190,096.51/499.73
  6. Step 6: Final answer
    x = 380.40

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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.