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Finding the Fourth Proportional to 505.26, 757.53 and 312.84

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Solution

The fourth proportional to 505.26, 757.53 and 312.84 is: 469.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.26 : 757.53 = 312.84 : x
  2. Step 2: Convert to fraction form
    505.26/757.53 = 312.84/x
  3. Step 3: Cross multiply
    505.26x = 757.53 × 312.84
  4. Step 4: Simplify right side
    505.26x = 236,985.69
  5. Step 5: Solve for x
    x = 236,985.69/505.26
  6. Step 6: Final answer
    x = 469.04

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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.