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Finding the Fourth Proportional to 670.39, 1,005.96 and 362.23

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Solution

The fourth proportional to 670.39, 1,005.96 and 362.23 is: 543.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.39 : 1,005.96 = 362.23 : x
  2. Step 2: Convert to fraction form
    670.39/1,005.96 = 362.23/x
  3. Step 3: Cross multiply
    670.39x = 1,005.96 × 362.23
  4. Step 4: Simplify right side
    670.39x = 364,388.89
  5. Step 5: Solve for x
    x = 364,388.89/670.39
  6. Step 6: Final answer
    x = 543.55

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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.