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Finding the Fourth Proportional to 614.74, 919.68 and 490.36

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Solution

The fourth proportional to 614.74, 919.68 and 490.36 is: 733.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.74 : 919.68 = 490.36 : x
  2. Step 2: Convert to fraction form
    614.74/919.68 = 490.36/x
  3. Step 3: Cross multiply
    614.74x = 919.68 × 490.36
  4. Step 4: Simplify right side
    614.74x = 450,974.28
  5. Step 5: Solve for x
    x = 450,974.28/614.74
  6. Step 6: Final answer
    x = 733.60

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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.