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Finding the Fourth Proportional to 460.14, 634.66 and 312.51

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Solution

The fourth proportional to 460.14, 634.66 and 312.51 is: 431.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.14 : 634.66 = 312.51 : x
  2. Step 2: Convert to fraction form
    460.14/634.66 = 312.51/x
  3. Step 3: Cross multiply
    460.14x = 634.66 × 312.51
  4. Step 4: Simplify right side
    460.14x = 198,337.60
  5. Step 5: Solve for x
    x = 198,337.60/460.14
  6. Step 6: Final answer
    x = 431.04

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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.