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Finding the Fourth Proportional to 649.35, 972.87 and 494.81

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Solution

The fourth proportional to 649.35, 972.87 and 494.81 is: 741.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.35 : 972.87 = 494.81 : x
  2. Step 2: Convert to fraction form
    649.35/972.87 = 494.81/x
  3. Step 3: Cross multiply
    649.35x = 972.87 × 494.81
  4. Step 4: Simplify right side
    649.35x = 481,386.21
  5. Step 5: Solve for x
    x = 481,386.21/649.35
  6. Step 6: Final answer
    x = 741.33

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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.