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Finding the Fourth Proportional to 449.85, 620.70 and 260.76

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Solution

The fourth proportional to 449.85, 620.70 and 260.76 is: 359.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.85 : 620.70 = 260.76 : x
  2. Step 2: Convert to fraction form
    449.85/620.70 = 260.76/x
  3. Step 3: Cross multiply
    449.85x = 620.70 × 260.76
  4. Step 4: Simplify right side
    449.85x = 161,853.73
  5. Step 5: Solve for x
    x = 161,853.73/449.85
  6. Step 6: Final answer
    x = 359.79

Related Problems

Find fourth proportional to 224.93, 310.35 and 130.38
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Double scale
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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.