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Finding the Fourth Proportional to 506.48, 759.11 and 289.40

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Solution

The fourth proportional to 506.48, 759.11 and 289.40 is: 433.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.48 : 759.11 = 289.40 : x
  2. Step 2: Convert to fraction form
    506.48/759.11 = 289.40/x
  3. Step 3: Cross multiply
    506.48x = 759.11 × 289.40
  4. Step 4: Simplify right side
    506.48x = 219,681.19
  5. Step 5: Solve for x
    x = 219,681.19/506.48
  6. Step 6: Final answer
    x = 433.75

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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.