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Finding the Fourth Proportional to 670.58, 1,006.04 and 231.86

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Solution

The fourth proportional to 670.58, 1,006.04 and 231.86 is: 347.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.58 : 1,006.04 = 231.86 : x
  2. Step 2: Convert to fraction form
    670.58/1,006.04 = 231.86/x
  3. Step 3: Cross multiply
    670.58x = 1,006.04 × 231.86
  4. Step 4: Simplify right side
    670.58x = 233,260.43
  5. Step 5: Solve for x
    x = 233,260.43/670.58
  6. Step 6: Final answer
    x = 347.85

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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.