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Finding the Fourth Proportional to 670.38, 1,005.40 and 183.46

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Solution

The fourth proportional to 670.38, 1,005.40 and 183.46 is: 275.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.38 : 1,005.40 = 183.46 : x
  2. Step 2: Convert to fraction form
    670.38/1,005.40 = 183.46/x
  3. Step 3: Cross multiply
    670.38x = 1,005.40 × 183.46
  4. Step 4: Simplify right side
    670.38x = 184,450.68
  5. Step 5: Solve for x
    x = 184,450.68/670.38
  6. Step 6: Final answer
    x = 275.14

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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.