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Finding the Fourth Proportional to 491.82, 736.38 and 389.76

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Solution

The fourth proportional to 491.82, 736.38 and 389.76 is: 583.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.82 : 736.38 = 389.76 : x
  2. Step 2: Convert to fraction form
    491.82/736.38 = 389.76/x
  3. Step 3: Cross multiply
    491.82x = 736.38 × 389.76
  4. Step 4: Simplify right side
    491.82x = 287,011.47
  5. Step 5: Solve for x
    x = 287,011.47/491.82
  6. Step 6: Final answer
    x = 583.57

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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.