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Finding the Fourth Proportional to 638.99, 958.48 and 176.77

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Solution

The fourth proportional to 638.99, 958.48 and 176.77 is: 265.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.99 : 958.48 = 176.77 : x
  2. Step 2: Convert to fraction form
    638.99/958.48 = 176.77/x
  3. Step 3: Cross multiply
    638.99x = 958.48 × 176.77
  4. Step 4: Simplify right side
    638.99x = 169,430.51
  5. Step 5: Solve for x
    x = 169,430.51/638.99
  6. Step 6: Final answer
    x = 265.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.