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Finding the Fourth Proportional to 670.16, 1,005.28 and 183.20

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Solution

The fourth proportional to 670.16, 1,005.28 and 183.20 is: 274.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.16 : 1,005.28 = 183.20 : x
  2. Step 2: Convert to fraction form
    670.16/1,005.28 = 183.20/x
  3. Step 3: Cross multiply
    670.16x = 1,005.28 × 183.20
  4. Step 4: Simplify right side
    670.16x = 184,167.30
  5. Step 5: Solve for x
    x = 184,167.30/670.16
  6. Step 6: Final answer
    x = 274.81

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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.