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Finding the Fourth Proportional to 459.28, 633.20 and 380.31

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Solution

The fourth proportional to 459.28, 633.20 and 380.31 is: 524.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.28 : 633.20 = 380.31 : x
  2. Step 2: Convert to fraction form
    459.28/633.20 = 380.31/x
  3. Step 3: Cross multiply
    459.28x = 633.20 × 380.31
  4. Step 4: Simplify right side
    459.28x = 240,809.13
  5. Step 5: Solve for x
    x = 240,809.13/459.28
  6. Step 6: Final answer
    x = 524.32

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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.