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Finding the Fourth Proportional to 670.38, 1,005.56 and 237.54

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Solution

The fourth proportional to 670.38, 1,005.56 and 237.54 is: 356.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.38 : 1,005.56 = 237.54 : x
  2. Step 2: Convert to fraction form
    670.38/1,005.56 = 237.54/x
  3. Step 3: Cross multiply
    670.38x = 1,005.56 × 237.54
  4. Step 4: Simplify right side
    670.38x = 238,860.72
  5. Step 5: Solve for x
    x = 238,860.72/670.38
  6. Step 6: Final answer
    x = 356.31

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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.