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Finding the Fourth Proportional to 930.32, 1,396.01 and 417.32

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Solution

The fourth proportional to 930.32, 1,396.01 and 417.32 is: 626.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.32 : 1,396.01 = 417.32 : x
  2. Step 2: Convert to fraction form
    930.32/1,396.01 = 417.32/x
  3. Step 3: Cross multiply
    930.32x = 1,396.01 × 417.32
  4. Step 4: Simplify right side
    930.32x = 582,575.91
  5. Step 5: Solve for x
    x = 582,575.91/930.32
  6. Step 6: Final answer
    x = 626.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.