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Finding the Fourth Proportional to 509.52, 763.48 and 289.86

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Solution

The fourth proportional to 509.52, 763.48 and 289.86 is: 434.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.52 : 763.48 = 289.86 : x
  2. Step 2: Convert to fraction form
    509.52/763.48 = 289.86/x
  3. Step 3: Cross multiply
    509.52x = 763.48 × 289.86
  4. Step 4: Simplify right side
    509.52x = 221,302.48
  5. Step 5: Solve for x
    x = 221,302.48/509.52
  6. Step 6: Final answer
    x = 434.33

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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.