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Finding the Fourth Proportional to 614.19, 920.46 and 457.32

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Solution

The fourth proportional to 614.19, 920.46 and 457.32 is: 685.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.19 : 920.46 = 457.32 : x
  2. Step 2: Convert to fraction form
    614.19/920.46 = 457.32/x
  3. Step 3: Cross multiply
    614.19x = 920.46 × 457.32
  4. Step 4: Simplify right side
    614.19x = 420,944.77
  5. Step 5: Solve for x
    x = 420,944.77/614.19
  6. Step 6: Final answer
    x = 685.37

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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.