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Finding the Fourth Proportional to 509.47, 763.90 and 201.08

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Solution

The fourth proportional to 509.47, 763.90 and 201.08 is: 301.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.47 : 763.90 = 201.08 : x
  2. Step 2: Convert to fraction form
    509.47/763.90 = 201.08/x
  3. Step 3: Cross multiply
    509.47x = 763.90 × 201.08
  4. Step 4: Simplify right side
    509.47x = 153,605.01
  5. Step 5: Solve for x
    x = 153,605.01/509.47
  6. Step 6: Final answer
    x = 301.50

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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.