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Finding the Fourth Proportional to 459.36, 633.42 and 389.70

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Solution

The fourth proportional to 459.36, 633.42 and 389.70 is: 537.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.36 : 633.42 = 389.70 : x
  2. Step 2: Convert to fraction form
    459.36/633.42 = 389.70/x
  3. Step 3: Cross multiply
    459.36x = 633.42 × 389.70
  4. Step 4: Simplify right side
    459.36x = 246,843.77
  5. Step 5: Solve for x
    x = 246,843.77/459.36
  6. Step 6: Final answer
    x = 537.36

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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.