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Finding the Fourth Proportional to 459.72, 633.96 and 389.70

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Solution

The fourth proportional to 459.72, 633.96 and 389.70 is: 537.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.72 : 633.96 = 389.70 : x
  2. Step 2: Convert to fraction form
    459.72/633.96 = 389.70/x
  3. Step 3: Cross multiply
    459.72x = 633.96 × 389.70
  4. Step 4: Simplify right side
    459.72x = 247,054.21
  5. Step 5: Solve for x
    x = 247,054.21/459.72
  6. Step 6: Final answer
    x = 537.40

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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.