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Finding the Fourth Proportional to 485.90, 670.51 and 264.85

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Solution

The fourth proportional to 485.90, 670.51 and 264.85 is: 365.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.90 : 670.51 = 264.85 : x
  2. Step 2: Convert to fraction form
    485.90/670.51 = 264.85/x
  3. Step 3: Cross multiply
    485.90x = 670.51 × 264.85
  4. Step 4: Simplify right side
    485.90x = 177,581.22
  5. Step 5: Solve for x
    x = 177,581.22/485.90
  6. Step 6: Final answer
    x = 365.47

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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.