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Finding the Fourth Proportional to 637.40, 879.59 and 357.65

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Solution

The fourth proportional to 637.40, 879.59 and 357.65 is: 493.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.40 : 879.59 = 357.65 : x
  2. Step 2: Convert to fraction form
    637.40/879.59 = 357.65/x
  3. Step 3: Cross multiply
    637.40x = 879.59 × 357.65
  4. Step 4: Simplify right side
    637.40x = 314,579.18
  5. Step 5: Solve for x
    x = 314,579.18/637.40
  6. Step 6: Final answer
    x = 493.54

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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.