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Finding the Fourth Proportional to 683.96, 1,026.59 and 440.64

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Solution

The fourth proportional to 683.96, 1,026.59 and 440.64 is: 661.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.96 : 1,026.59 = 440.64 : x
  2. Step 2: Convert to fraction form
    683.96/1,026.59 = 440.64/x
  3. Step 3: Cross multiply
    683.96x = 1,026.59 × 440.64
  4. Step 4: Simplify right side
    683.96x = 452,354.41
  5. Step 5: Solve for x
    x = 452,354.41/683.96
  6. Step 6: Final answer
    x = 661.38

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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.