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Finding the Fourth Proportional to 459.55, 634.27 and 291.39

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Solution

The fourth proportional to 459.55, 634.27 and 291.39 is: 402.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.55 : 634.27 = 291.39 : x
  2. Step 2: Convert to fraction form
    459.55/634.27 = 291.39/x
  3. Step 3: Cross multiply
    459.55x = 634.27 × 291.39
  4. Step 4: Simplify right side
    459.55x = 184,819.98
  5. Step 5: Solve for x
    x = 184,819.98/459.55
  6. Step 6: Final answer
    x = 402.18

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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.