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Finding the Fourth Proportional to 930.63, 1,396.88 and 410.86

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Solution

The fourth proportional to 930.63, 1,396.88 and 410.86 is: 616.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.63 : 1,396.88 = 410.86 : x
  2. Step 2: Convert to fraction form
    930.63/1,396.88 = 410.86/x
  3. Step 3: Cross multiply
    930.63x = 1,396.88 × 410.86
  4. Step 4: Simplify right side
    930.63x = 573,922.12
  5. Step 5: Solve for x
    x = 573,922.12/930.63
  6. Step 6: Final answer
    x = 616.70

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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.