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Finding the Fourth Proportional to 450.23, 619.83 and 392.01

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Solution

The fourth proportional to 450.23, 619.83 and 392.01 is: 539.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.23 : 619.83 = 392.01 : x
  2. Step 2: Convert to fraction form
    450.23/619.83 = 392.01/x
  3. Step 3: Cross multiply
    450.23x = 619.83 × 392.01
  4. Step 4: Simplify right side
    450.23x = 242,979.56
  5. Step 5: Solve for x
    x = 242,979.56/450.23
  6. Step 6: Final answer
    x = 539.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.