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Finding the Fourth Proportional to 670.42, 1,003.11 and 465.39

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Solution

The fourth proportional to 670.42, 1,003.11 and 465.39 is: 696.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.42 : 1,003.11 = 465.39 : x
  2. Step 2: Convert to fraction form
    670.42/1,003.11 = 465.39/x
  3. Step 3: Cross multiply
    670.42x = 1,003.11 × 465.39
  4. Step 4: Simplify right side
    670.42x = 466,837.36
  5. Step 5: Solve for x
    x = 466,837.36/670.42
  6. Step 6: Final answer
    x = 696.34

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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.