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Finding the Fourth Proportional to 637.05, 879 and 357.30

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Solution

The fourth proportional to 637.05, 879 and 357.30 is: 493.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.05 : 879 = 357.30 : x
  2. Step 2: Convert to fraction form
    637.05/879 = 357.30/x
  3. Step 3: Cross multiply
    637.05x = 879 × 357.30
  4. Step 4: Simplify right side
    637.05x = 314,066.70
  5. Step 5: Solve for x
    x = 314,066.70/637.05
  6. Step 6: Final answer
    x = 493.00

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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.