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Finding the Fourth Proportional to 505.29, 751.94 and 485.85

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Solution

The fourth proportional to 505.29, 751.94 and 485.85 is: 723.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.29 : 751.94 = 485.85 : x
  2. Step 2: Convert to fraction form
    505.29/751.94 = 485.85/x
  3. Step 3: Cross multiply
    505.29x = 751.94 × 485.85
  4. Step 4: Simplify right side
    505.29x = 365,330.05
  5. Step 5: Solve for x
    x = 365,330.05/505.29
  6. Step 6: Final answer
    x = 723.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.