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Finding the Fourth Proportional to 556.38, 835.13 and 491.81

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Solution

The fourth proportional to 556.38, 835.13 and 491.81 is: 738.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.38 : 835.13 = 491.81 : x
  2. Step 2: Convert to fraction form
    556.38/835.13 = 491.81/x
  3. Step 3: Cross multiply
    556.38x = 835.13 × 491.81
  4. Step 4: Simplify right side
    556.38x = 410,722.34
  5. Step 5: Solve for x
    x = 410,722.34/556.38
  6. Step 6: Final answer
    x = 738.20

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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.