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Finding the Fourth Proportional to 670.62, 1,005.93 and 237.81

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Solution

The fourth proportional to 670.62, 1,005.93 and 237.81 is: 356.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.62 : 1,005.93 = 237.81 : x
  2. Step 2: Convert to fraction form
    670.62/1,005.93 = 237.81/x
  3. Step 3: Cross multiply
    670.62x = 1,005.93 × 237.81
  4. Step 4: Simplify right side
    670.62x = 239,220.21
  5. Step 5: Solve for x
    x = 239,220.21/670.62
  6. Step 6: Final answer
    x = 356.72

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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.