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Finding the Fourth Proportional to 485.72, 670.28 and 264.67

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Solution

The fourth proportional to 485.72, 670.28 and 264.67 is: 365.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.72 : 670.28 = 264.67 : x
  2. Step 2: Convert to fraction form
    485.72/670.28 = 264.67/x
  3. Step 3: Cross multiply
    485.72x = 670.28 × 264.67
  4. Step 4: Simplify right side
    485.72x = 177,403.01
  5. Step 5: Solve for x
    x = 177,403.01/485.72
  6. Step 6: Final answer
    x = 365.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.