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Finding the Fourth Proportional to 637.65, 880.38 and 490.02

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Solution

The fourth proportional to 637.65, 880.38 and 490.02 is: 676.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.65 : 880.38 = 490.02 : x
  2. Step 2: Convert to fraction form
    637.65/880.38 = 490.02/x
  3. Step 3: Cross multiply
    637.65x = 880.38 × 490.02
  4. Step 4: Simplify right side
    637.65x = 431,403.81
  5. Step 5: Solve for x
    x = 431,403.81/637.65
  6. Step 6: Final answer
    x = 676.55

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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.