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Finding the Fourth Proportional to 459.47, 634.16 and 291.31

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Solution

The fourth proportional to 459.47, 634.16 and 291.31 is: 402.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.47 : 634.16 = 291.31 : x
  2. Step 2: Convert to fraction form
    459.47/634.16 = 291.31/x
  3. Step 3: Cross multiply
    459.47x = 634.16 × 291.31
  4. Step 4: Simplify right side
    459.47x = 184,736.29
  5. Step 5: Solve for x
    x = 184,736.29/459.47
  6. Step 6: Final answer
    x = 402.07

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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.