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Finding the Fourth Proportional to 637.69, 879.96 and 357.91

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Solution

The fourth proportional to 637.69, 879.96 and 357.91 is: 493.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.69 : 879.96 = 357.91 : x
  2. Step 2: Convert to fraction form
    637.69/879.96 = 357.91/x
  3. Step 3: Cross multiply
    637.69x = 879.96 × 357.91
  4. Step 4: Simplify right side
    637.69x = 314,946.48
  5. Step 5: Solve for x
    x = 314,946.48/637.69
  6. Step 6: Final answer
    x = 493.89

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1.5x scale

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.