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Finding the Fourth Proportional to 670.54, 1,005.90 and 237.66

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Solution

The fourth proportional to 670.54, 1,005.90 and 237.66 is: 356.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.54 : 1,005.90 = 237.66 : x
  2. Step 2: Convert to fraction form
    670.54/1,005.90 = 237.66/x
  3. Step 3: Cross multiply
    670.54x = 1,005.90 × 237.66
  4. Step 4: Simplify right side
    670.54x = 239,057.16
  5. Step 5: Solve for x
    x = 239,057.16/670.54
  6. Step 6: Final answer
    x = 356.52

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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.