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Finding the Fourth Proportional to 491.98, 737.81 and 459.63

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Solution

The fourth proportional to 491.98, 737.81 and 459.63 is: 689.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.98 : 737.81 = 459.63 : x
  2. Step 2: Convert to fraction form
    491.98/737.81 = 459.63/x
  3. Step 3: Cross multiply
    491.98x = 737.81 × 459.63
  4. Step 4: Simplify right side
    491.98x = 339,119.61
  5. Step 5: Solve for x
    x = 339,119.61/491.98
  6. Step 6: Final answer
    x = 689.30

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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.