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Finding the Fourth Proportional to 460.14, 634.32 and 390.30

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Solution

The fourth proportional to 460.14, 634.32 and 390.30 is: 538.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.14 : 634.32 = 390.30 : x
  2. Step 2: Convert to fraction form
    460.14/634.32 = 390.30/x
  3. Step 3: Cross multiply
    460.14x = 634.32 × 390.30
  4. Step 4: Simplify right side
    460.14x = 247,575.10
  5. Step 5: Solve for x
    x = 247,575.10/460.14
  6. Step 6: Final answer
    x = 538.04

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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.