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Finding the Fourth Proportional to 491.98, 738.28 and 383.98

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Solution

The fourth proportional to 491.98, 738.28 and 383.98 is: 576.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.98 : 738.28 = 383.98 : x
  2. Step 2: Convert to fraction form
    491.98/738.28 = 383.98/x
  3. Step 3: Cross multiply
    491.98x = 738.28 × 383.98
  4. Step 4: Simplify right side
    491.98x = 283,484.75
  5. Step 5: Solve for x
    x = 283,484.75/491.98
  6. Step 6: Final answer
    x = 576.21

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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.